diff --git a/README.md b/README.md
index c57f7d64..5f7d4a8c 100644
--- a/README.md
+++ b/README.md
@@ -69,15 +69,17 @@ Table of Contents
     * [Demo](#demo)
 * [Examples](#examples)
 * [Key bindings for command-line](#key-bindings-for-command-line)
-* [Fuzzy completion for bash and zsh](#fuzzy-completion-for-bash-and-zsh)
+* [Fuzzy completion](#fuzzy-completion)
     * [Files and directories](#files-and-directories)
     * [Process IDs](#process-ids)
     * [Host names](#host-names)
     * [Environment variables / Aliases](#environment-variables--aliases)
-    * [Customizing fzf options for completion](#customizing-fzf-options-for-completion)
-    * [Customizing completion source for paths and directories](#customizing-completion-source-for-paths-and-directories)
-    * [Supported commands](#supported-commands)
-    * [Custom fuzzy completion](#custom-fuzzy-completion)
+    * [Customizing fuzzy completion for bash and zsh](#customizing-fuzzy-completion-for-bash-and-zsh)
+        * [Customizing fzf options for completion](#customizing-fzf-options-for-completion)
+        * [Customizing completion source for paths and directories](#customizing-completion-source-for-paths-and-directories)
+        * [Supported commands (bash)](#supported-commands-bash)
+        * [Custom fuzzy completion](#custom-fuzzy-completion)
+    * [Fuzzy completion for fish](#fuzzy-completion-for-fish)
 * [Vim plugin](#vim-plugin)
 * [Advanced topics](#advanced-topics)
     * [Customizing for different types of input](#customizing-for-different-types-of-input)
@@ -556,8 +558,10 @@ Display modes for these bindings can be separately configured via
 
 More tips can be found on [the wiki page](https://github.com/junegunn/fzf/wiki/Configuring-shell-key-bindings).
 
-Fuzzy completion for bash and zsh
----------------------------------
+Fuzzy completion
+----------------
+
+Shell integration also provides fuzzy completion for bash, zsh, and fish.
 
 ### Files and directories
 
@@ -599,23 +603,28 @@ kill -9 **<TAB>
 
 ### Host names
 
-For ssh and telnet commands, fuzzy completion for hostnames is provided. The
-names are extracted from /etc/hosts and ~/.ssh/config.
+For ssh command, fuzzy completion for hostnames is provided. The names are
+extracted from /etc/hosts and ~/.ssh/config.
 
 ```sh
 ssh **<TAB>
-telnet **<TAB>
 ```
 
 ### Environment variables / Aliases
 
 ```sh
+# bash and zsh
 unset **<TAB>
 export **<TAB>
 unalias **<TAB>
+
+# fish
+set <SHIFT-TAB>
 ```
 
-### Customizing fzf options for completion
+### Customizing fuzzy completion for bash and zsh
+
+#### Customizing fzf options for completion
 
 ```sh
 # Use ~~ as the trigger sequence instead of the default **
@@ -646,7 +655,7 @@ _fzf_comprun() {
 }
 ```
 
-### Customizing completion source for paths and directories
+#### Customizing completion source for paths and directories
 
 ```sh
 # Use fd (https://github.com/sharkdp/fd) for listing path candidates.
@@ -662,7 +671,7 @@ _fzf_compgen_dir() {
 }
 ```
 
-### Supported commands
+#### Supported commands (bash)
 
 On bash, fuzzy completion is enabled only for a predefined set of commands
 (`complete | grep _fzf` to see the list). But you can enable it for other
@@ -674,7 +683,7 @@ _fzf_setup_completion path ag git kubectl
 _fzf_setup_completion dir tree
 ```
 
-### Custom fuzzy completion
+#### Custom fuzzy completion
 
 _**(Custom completion API is experimental and subject to change)**_
 
@@ -724,6 +733,65 @@ _fzf_complete_foo_post() {
 [ -n "$BASH" ] && complete -F _fzf_complete_foo -o default -o bashdefault foo
 ```
 
+### Fuzzy completion for fish
+
+(Available in 0.68.0 or later)
+
+Fuzzy completion for fish differs from bash and zsh in that:
+
+- It doesn't require a trigger sequence like `**`. Instead, if activates
+  on `Shift-TAB`, while `TAB` preserves fish's native completion behavior.
+- It relies on fish's native completion system to populate the candidate list,
+  rather than performing a recursive file system traversal. For recursive
+  searching, use the `CTRL-T` binding instead.
+- The only supported configuration variable is `FZF_COMPLETION_OPTS`.
+
+That said, just like in bash and zsh, you can implement custom completion for
+a specific command by defining an `_fzf_complete_COMMAND` function. For example:
+
+```fish
+function _fzf_complete_foo
+  function _fzf_complete_foo_post
+    awk '{print $NF}'
+  end
+  _fzf_complete --multi --reverse --header-lines=3 -- $argv < (ls -al | psub)
+
+  functions -e _fzf_complete_foo_post
+end
+```
+
+And here's a more complex example for customizing `git`
+
+```fish
+function _fzf_complete_git
+  switch $argv[2]
+    case checkout switch
+      _fzf_complete --reverse --no-preview -- $argv < (git branch --all --format='%(refname:short)' | psub)
+
+    case add
+      function _fzf_complete_git_post
+        awk '{print $NF}'
+      end
+      _fzf_complete --multi --reverse -- $argv < (git status --short | psub)
+
+    case show log diff
+      function _fzf_complete_git_post
+        awk '{print $1}'
+      end
+      _fzf_complete --reverse --no-sort --preview='git show --color=always {1}' -- $argv < (git log --oneline | psub)
+
+    case ''
+      __fzf_complete_native "$argv[1] " --query=(commandline -t | string escape)
+
+    case '*'
+      set -l -- current_token (commandline -t)
+      __fzf_complete_native "$argv $current_token" --query=(string escape -- $current_token) --multi
+  end
+
+  functions -e _fzf_complete_git_post
+end
+```
+
 Vim plugin
 ----------
 
diff --git a/install b/install
index 6d0149e4..66fe4d20 100755
--- a/install
+++ b/install
@@ -243,16 +243,16 @@ fi
 
 echo
 for shell in $shells; do
+  fzf_completion="source \"$fzf_base/shell/completion.${shell}\""
+  fzf_key_bindings="source \"$fzf_base/shell/key-bindings.${shell}\""
   [[ $shell == fish ]] && continue
   src=${prefix_expand}.${shell}
   echo -n "Generate $src ... "
 
-  fzf_completion="source \"$fzf_base/shell/completion.${shell}\""
   if [ $auto_completion -eq 0 ]; then
     fzf_completion="# $fzf_completion"
   fi
 
-  fzf_key_bindings="source \"$fzf_base/shell/key-bindings.${shell}\""
   if [ $key_bindings -eq 0 ]; then
     fzf_key_bindings="# $fzf_key_bindings"
   fi
@@ -302,15 +302,16 @@ append_line() {
   line="$2"
   file="$3"
   pat="${4:-}"
+  at_lno="${5:-}"
   lines=""
 
   echo "Update $file:"
   echo "  - $line"
   if [ -f "$file" ]; then
-    if [ $# -lt 4 ]; then
-      lines=$(\grep -nF "$line" "$file")
-    else
+    if [[ -n $pat ]]; then
       lines=$(\grep -nF "$pat" "$file")
+    else
+      lines=$(\grep -nF "${line#"${line%%[![:space:]]*}"}" "$file")
     fi
   fi
 
@@ -328,8 +329,12 @@ append_line() {
 
   set -e
   if [ "$update" -eq 1 ]; then
-    [ -f "$file" ] && echo >> "$file"
-    echo "$line" >> "$file"
+    if [[ -z $at_lno ]]; then
+      [ -f "$file" ] && echo >> "$file"
+      echo "$line" >> "$file"
+    else
+      sed -i.~fzf_bak "${at_lno}a\\"$'\n'"$line" "$file" && rm "$file.~fzf_bak"
+    fi
     echo "    + Added"
   else
     echo "    ~ Skipped"
@@ -362,25 +367,66 @@ for shell in $shells; do
   append_line $update_config "[ -f ${prefix}.${shell} ] && source ${prefix}.${shell}" "$dest" "${prefix}.${shell}"
 done
 
-if [ $key_bindings -eq 1 ] && [[ $shells =~ fish ]]; then
+if [[ $shells =~ fish ]]; then
   bind_file="${fish_dir}/functions/fish_user_key_bindings.fish"
   if [ ! -e "$bind_file" ]; then
-    mkdir -p "${fish_dir}/functions"
-    create_file "$bind_file" \
-      'function fish_user_key_bindings' \
-      '  fzf --fish | source' \
-      'end'
+    if [[ $key_bindings -eq 1 || $auto_completion -eq 1 ]]; then
+      mkdir -p "${fish_dir}/functions"
+      if [[ $key_bindings -eq 1 && $auto_completion -eq 1 ]]; then
+        create_file "$bind_file" \
+          'function fish_user_key_bindings' \
+          '  fzf --fish | source' \
+          'end'
+      elif [[ $key_bindings -eq 1 ]]; then
+        create_file "$bind_file" \
+          'function fish_user_key_bindings' \
+          "  $fzf_key_bindings" \
+          'end'
+      elif [[ $auto_completion -eq 1 ]]; then
+        create_file "$bind_file" \
+          'function fish_user_key_bindings' \
+          "  $fzf_completion" \
+          'end'
+      fi
+      lno_func=$(\grep -nF "function fish_user_key_bindings" "$bind_file" | sed 's/:.*//' | tr '\n' ' ')
+    else
+      lno_func=0
+    fi
   else
     echo "Check $bind_file:"
-    lno=$(\grep -nF "fzf_key_bindings" "$bind_file" | sed 's/:.*//' | tr '\n' ' ')
-    if [[ -n $lno ]]; then
-      echo "  ** Found 'fzf_key_bindings' in line #$lno"
-      echo "  ** You have to replace the line to 'fzf --fish | source'"
+    lno_func=$(\grep -nF "function fish_user_key_bindings" "$bind_file" | sed 's/:.*//' | tr '\n' ' ')
+    if [[ -z $lno_func ]]; then
+      echo -e "function fish_user_key_bindings\nend" >> "$bind_file"
+      lno_func=$(\grep -nF "function fish_user_key_bindings" "$bind_file" | sed 's/:.*//' | tr '\n' ' ')
+    fi
+    lno_keys=$(\grep -nF "fzf_key_bindings" "$bind_file" | sed 's/:.*//' | tr '\n' ' ')
+    if [[ -n $lno_keys ]]; then
+      echo "  ** Found 'fzf_key_bindings' in line #$lno_keys"
+      if [[ $key_bindings -eq 1 && $auto_completion -eq 1 ]]; then
+        echo "  ** You have to replace the line to 'fzf --fish | source'"
+      elif [[ $key_bindings -eq 1 ]]; then
+        echo "  ** You have to replace the line to '$fzf_key_bindings'"
+      else
+        echo "  ** You have to remove the line"
+      fi
       echo
     else
       echo "  - Clear"
       echo
-      append_line $update_config "fzf --fish | source" "$bind_file"
+      if [[ $key_bindings -eq 1 && $auto_completion -eq 1 ]]; then
+        sed -i.~fzf_bak "\#$fzf_completion#d" "$bind_file" && rm "$bind_file.~fzf_bak"
+        sed -i.~fzf_bak "\#$fzf_key_bindings#d" "$bind_file" && rm "$bind_file.~fzf_bak"
+        append_line $update_config "  fzf --fish | source" "$bind_file" "" "$lno_func"
+      else
+        sed -i.~fzf_bak '/fzf --fish \| source/d' "$bind_file" && rm "$bind_file.~fzf_bak"
+        if [[ $key_bindings -eq 1 ]]; then
+          sed -i.~fzf_bak "\#$fzf_completion#d" "$bind_file" && rm "$bind_file.~fzf_bak"
+          append_line $update_config "  $fzf_key_bindings" "$bind_file" "" "$lno_func"
+        elif [[ $auto_completion -eq 1 ]]; then
+          sed -i.~fzf_bak "\#$fzf_key_bindings#d" "$bind_file" && rm "$bind_file.~fzf_bak"
+          append_line $update_config "  $fzf_completion" "$bind_file" "" "$lno_func"
+        fi
+      fi
     fi
   fi
 fi
@@ -393,7 +439,7 @@ if [ $update_config -eq 1 ]; then
     echo
   fi
   [[ $shells =~ zsh ]] && echo "   source ${ZDOTDIR:-~}/.zshrc   # zsh"
-  [[ $shells =~ fish ]] && [ $key_bindings -eq 1 ] && echo '   fzf_key_bindings  # fish'
+  [[ $shells =~ fish && $lno_func -ne 0 ]] && echo '   fzf_user_key_bindings  # fish'
   echo
   echo 'Use uninstall script to remove fzf.'
   echo
diff --git a/main.go b/main.go
index 0a2f9ade..d5e019fd 100644
--- a/main.go
+++ b/main.go
@@ -29,6 +29,9 @@ var zshCompletion []byte
 //go:embed shell/key-bindings.fish
 var fishKeyBindings []byte
 
+//go:embed shell/completion.fish
+var fishCompletion []byte
+
 //go:embed man/man1/fzf.1
 var manPage []byte
 
@@ -65,7 +68,7 @@ func main() {
 	}
 	if options.Fish {
 		printScript("key-bindings.fish", fishKeyBindings)
-		fmt.Println("fzf_key_bindings")
+		printScript("completion.fish", fishCompletion)
 		return
 	}
 	if options.Help {
diff --git a/shell/common.fish b/shell/common.fish
new file mode 100644
index 00000000..b6b7e0bb
--- /dev/null
+++ b/shell/common.fish
@@ -0,0 +1,141 @@
+  function __fzf_defaults
+    # $argv[1]: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+    # $argv[2..]: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+    test -n "$FZF_TMUX_HEIGHT"; or set -l FZF_TMUX_HEIGHT 40%
+    string join ' ' -- \
+      "--height $FZF_TMUX_HEIGHT --min-height=20+ --bind=ctrl-z:ignore" $argv[1] \
+      (test -r "$FZF_DEFAULT_OPTS_FILE"; and string join -- ' ' <$FZF_DEFAULT_OPTS_FILE) \
+      $FZF_DEFAULT_OPTS $argv[2..-1]
+  end
+
+  function __fzfcmd
+    test -n "$FZF_TMUX_HEIGHT"; or set -l FZF_TMUX_HEIGHT 40%
+    if test -n "$FZF_TMUX_OPTS"
+      echo "fzf-tmux $FZF_TMUX_OPTS -- "
+    else if test "$FZF_TMUX" = "1"
+      echo "fzf-tmux -d$FZF_TMUX_HEIGHT -- "
+    else
+      echo "fzf"
+    end
+  end
+
+  function __fzf_cmd_tokens -d 'Return command line tokens, skipping leading env assignments and command prefixes'
+    # Get tokens - use version-appropriate flags
+    set -l tokens
+    if test (string match -r -- '^\d+' $version) -ge 4
+      set -- tokens (commandline -xpc)
+    else
+      set -- tokens (commandline -opc)
+    end
+
+    # Filter out leading environment variable assignments
+    set -l -- var_count 0
+    for i in $tokens
+      if string match -qr -- '^[\w]+=' $i
+        set var_count (math $var_count + 1)
+      else
+        break
+      end
+    end
+    set -e -- tokens[0..$var_count]
+
+    # Skip command prefixes so callers see the actual command name,
+    # e.g. "builtin cd" → "cd", "env VAR=1 command cd" → "cd"
+    while true
+      switch "$tokens[1]"
+        case builtin command
+          set -e -- tokens[1]
+          test "$tokens[1]" = "--"; and set -e -- tokens[1]
+        case env
+          set -e -- tokens[1]
+          test "$tokens[1]" = "--"; and set -e -- tokens[1]
+          while string match -qr -- '^[\w]+=' "$tokens[1]"
+            set -e -- tokens[1]
+          end
+        case '*'
+          break
+      end
+    end
+
+    string escape -n -- $tokens
+  end
+
+  function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'
+    set -l fzf_query ''
+    set -l prefix ''
+    set -l dir '.'
+
+    # Set variables containing the major and minor fish version numbers, using
+    # a method compatible with all supported fish versions.
+    set -l -- fish_major (string match -r -- '^\d+' $version)
+    set -l -- fish_minor (string match -r -- '^\d+\.(\d+)' $version)[2]
+
+    # fish v3.3.0 and newer: Don't use option prefix if " -- " is preceded.
+    set -l -- match_regex '(?<fzf_query>[\s\S]*?(?=\n?$)$)'
+    set -l -- prefix_regex '^-[^\s=]+=|^-(?!-)\S'
+    if test "$fish_major" -eq 3 -a "$fish_minor" -lt 3
+    or string match -q -v -- '* -- *' (string sub -l (commandline -Cp) -- (commandline -p))
+      set -- match_regex "(?<prefix>$prefix_regex)?$match_regex"
+    end
+
+    # Set $prefix and expanded $fzf_query with preserved trailing newlines.
+    if test "$fish_major" -ge 4
+      # fish v4.0.0 and newer
+      string match -q -r -- $match_regex (commandline --current-token --tokens-expanded | string collect -N)
+    else if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+      # fish v3.2.0 - v3.7.1 (last v3)
+      string match -q -r -- $match_regex (commandline --current-token --tokenize | string collect -N)
+      eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^\\\(?=~)|\\\(?=\$\w)' '')
+    else
+      # fish older than v3.2.0 (v3.1b1 - v3.1.2)
+      set -l -- cl_token (commandline --current-token --tokenize | string collect -N)
+      set -- prefix (string match -r -- $prefix_regex $cl_token)
+      set -- fzf_query (string replace -- "$prefix" '' $cl_token | string collect -N)
+      eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^\\\(?=~)|\\\(?=\$\w)|\\\n\\\n$' '')
+    end
+
+    if test -n "$fzf_query"
+      # Normalize path in $fzf_query, set $dir to the longest existing directory.
+      if test \( "$fish_major" -ge 4 \) -o \( "$fish_major" -eq 3 -a "$fish_minor" -ge 5 \)
+        # fish v3.5.0 and newer
+        set -- fzf_query (path normalize -- $fzf_query)
+        set -- dir $fzf_query
+        while not path is -d $dir
+          set -- dir (path dirname $dir)
+        end
+      else
+        # fish older than v3.5.0 (v3.1b1 - v3.4.1)
+        if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+          # fish v3.2.0 - v3.4.1
+          string match -q -r -- '(?<fzf_query>^[\s\S]*?(?=\n?$)$)' \
+            (string replace -r -a -- '(?<=/)/|(?<!^)/+(?!\n)$' '' $fzf_query | string collect -N)
+        else
+          # fish v3.1b1 - v3.1.2
+          set -- fzf_query (string replace -r -a -- '(?<=/)/|(?<!^)/+(?!\n)$' '' $fzf_query | string collect -N)
+          eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r '\\\n$' '')
+        end
+        set -- dir $fzf_query
+        while not test -d "$dir"
+          set -- dir (dirname -z -- "$dir" | string split0)
+        end
+      end
+
+      if not string match -q -- '.' $dir; or string match -q -r -- '^\./|^\.$' $fzf_query
+        # Strip $dir from $fzf_query - preserve trailing newlines.
+        if test "$fish_major" -ge 4
+          # fish v4.0.0 and newer
+          string match -q -r -- '^'(string escape --style=regex -- $dir)'/?(?<fzf_query>[\s\S]*)' $fzf_query
+        else if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+          # fish v3.2.0 - v3.7.1 (last v3)
+          string match -q -r -- '^/?(?<fzf_query>[\s\S]*?(?=\n?$)$)' \
+            (string replace -- "$dir" '' $fzf_query | string collect -N)
+        else
+          # fish older than v3.2.0 (v3.1b1 - v3.1.2)
+          set -- fzf_query (string replace -- "$dir" '' $fzf_query | string collect -N)
+          eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^/?|\\\n$' '')
+        end
+      end
+    end
+
+    string escape -n -- "$dir" "$fzf_query" "$prefix"
+  end
diff --git a/shell/completion.fish b/shell/completion.fish
new file mode 100644
index 00000000..a1281c31
--- /dev/null
+++ b/shell/completion.fish
@@ -0,0 +1,241 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ completion.fish
+#
+# - $FZF_COMPLETION_OPTS                  (default: empty)
+
+function fzf_completion_setup
+
+#----BEGIN INCLUDE common.fish
+# NOTE: Do not directly edit this section, which is copied from "common.fish".
+# To modify it, one can edit "common.fish" and run "./update.sh" to apply
+# the changes. See code comments in "common.fish" for the implementation details.
+
+  function __fzf_defaults
+    test -n "$FZF_TMUX_HEIGHT"; or set -l FZF_TMUX_HEIGHT 40%
+    string join ' ' -- \
+      "--height $FZF_TMUX_HEIGHT --min-height=20+ --bind=ctrl-z:ignore" $argv[1] \
+      (test -r "$FZF_DEFAULT_OPTS_FILE"; and string join -- ' ' <$FZF_DEFAULT_OPTS_FILE) \
+      $FZF_DEFAULT_OPTS $argv[2..-1]
+  end
+
+  function __fzfcmd
+    test -n "$FZF_TMUX_HEIGHT"; or set -l FZF_TMUX_HEIGHT 40%
+    if test -n "$FZF_TMUX_OPTS"
+      echo "fzf-tmux $FZF_TMUX_OPTS -- "
+    else if test "$FZF_TMUX" = "1"
+      echo "fzf-tmux -d$FZF_TMUX_HEIGHT -- "
+    else
+      echo "fzf"
+    end
+  end
+
+  function __fzf_cmd_tokens -d 'Return command line tokens, skipping leading env assignments and command prefixes'
+    set -l tokens
+    if test (string match -r -- '^\d+' $version) -ge 4
+      set -- tokens (commandline -xpc)
+    else
+      set -- tokens (commandline -opc)
+    end
+
+    set -l -- var_count 0
+    for i in $tokens
+      if string match -qr -- '^[\w]+=' $i
+        set var_count (math $var_count + 1)
+      else
+        break
+      end
+    end
+    set -e -- tokens[0..$var_count]
+
+    while true
+      switch "$tokens[1]"
+        case builtin command
+          set -e -- tokens[1]
+          test "$tokens[1]" = "--"; and set -e -- tokens[1]
+        case env
+          set -e -- tokens[1]
+          test "$tokens[1]" = "--"; and set -e -- tokens[1]
+          while string match -qr -- '^[\w]+=' "$tokens[1]"
+            set -e -- tokens[1]
+          end
+        case '*'
+          break
+      end
+    end
+
+    string escape -n -- $tokens
+  end
+
+  function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'
+    set -l fzf_query ''
+    set -l prefix ''
+    set -l dir '.'
+
+    set -l -- fish_major (string match -r -- '^\d+' $version)
+    set -l -- fish_minor (string match -r -- '^\d+\.(\d+)' $version)[2]
+
+    set -l -- match_regex '(?<fzf_query>[\s\S]*?(?=\n?$)$)'
+    set -l -- prefix_regex '^-[^\s=]+=|^-(?!-)\S'
+    if test "$fish_major" -eq 3 -a "$fish_minor" -lt 3
+    or string match -q -v -- '* -- *' (string sub -l (commandline -Cp) -- (commandline -p))
+      set -- match_regex "(?<prefix>$prefix_regex)?$match_regex"
+    end
+
+    if test "$fish_major" -ge 4
+      string match -q -r -- $match_regex (commandline --current-token --tokens-expanded | string collect -N)
+    else if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+      string match -q -r -- $match_regex (commandline --current-token --tokenize | string collect -N)
+      eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^\\\(?=~)|\\\(?=\$\w)' '')
+    else
+      set -l -- cl_token (commandline --current-token --tokenize | string collect -N)
+      set -- prefix (string match -r -- $prefix_regex $cl_token)
+      set -- fzf_query (string replace -- "$prefix" '' $cl_token | string collect -N)
+      eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^\\\(?=~)|\\\(?=\$\w)|\\\n\\\n$' '')
+    end
+
+    if test -n "$fzf_query"
+      if test \( "$fish_major" -ge 4 \) -o \( "$fish_major" -eq 3 -a "$fish_minor" -ge 5 \)
+        set -- fzf_query (path normalize -- $fzf_query)
+        set -- dir $fzf_query
+        while not path is -d $dir
+          set -- dir (path dirname $dir)
+        end
+      else
+        if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+          string match -q -r -- '(?<fzf_query>^[\s\S]*?(?=\n?$)$)' \
+            (string replace -r -a -- '(?<=/)/|(?<!^)/+(?!\n)$' '' $fzf_query | string collect -N)
+        else
+          set -- fzf_query (string replace -r -a -- '(?<=/)/|(?<!^)/+(?!\n)$' '' $fzf_query | string collect -N)
+          eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r '\\\n$' '')
+        end
+        set -- dir $fzf_query
+        while not test -d "$dir"
+          set -- dir (dirname -z -- "$dir" | string split0)
+        end
+      end
+
+      if not string match -q -- '.' $dir; or string match -q -r -- '^\./|^\.$' $fzf_query
+        if test "$fish_major" -ge 4
+          string match -q -r -- '^'(string escape --style=regex -- $dir)'/?(?<fzf_query>[\s\S]*)' $fzf_query
+        else if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+          string match -q -r -- '^/?(?<fzf_query>[\s\S]*?(?=\n?$)$)' \
+            (string replace -- "$dir" '' $fzf_query | string collect -N)
+        else
+          set -- fzf_query (string replace -- "$dir" '' $fzf_query | string collect -N)
+          eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^/?|\\\n$' '')
+        end
+      end
+    end
+
+    string escape -n -- "$dir" "$fzf_query" "$prefix"
+  end
+#----END INCLUDE
+
+  # Use complete builtin for specific commands
+  function __fzf_complete_native
+    set -l -- token (commandline -t)
+    set -l -- completions (eval complete -C \"$argv[1]\")
+    test -n "$completions"; or begin commandline -f repaint; return; end
+
+    # Calculate tabstop based on longest completion item (sample first 500 for performance)
+    set -l -- tabstop 20
+    set -l -- sample_size (math "min(500, "(count $completions)")")
+    for c in $completions[1..$sample_size]
+      set -l -- len (string length -V -- (string split -- \t $c))
+      test -n "$len[2]" -a "$len[1]" -gt "$tabstop"
+      and set -- tabstop $len[1]
+    end
+    # limit to 120 to prevent long lines
+    set -- tabstop (math "min($tabstop + 4, 120)")
+
+    set -l result
+    set -lx -- FZF_DEFAULT_OPTS (__fzf_defaults \
+      "--reverse --delimiter=\\t --nth=1 --tabstop=$tabstop --color=fg:dim,nth:regular" \
+      $FZF_COMPLETION_OPTS $argv[2..-1] --accept-nth=1 --read0 --print0)
+    set -- result (string join0 -- $completions | eval (__fzfcmd) | string split0)
+    and begin
+      set -l -- tail ' '
+      # Append / to bare ~username results (fish omits it unlike other shells)
+      set -- result (string replace -r -- '^(~\w+)\s?$' '$1/' $result)
+      # Don't add trailing space if single result is a directory
+      test (count $result) -eq 1
+      and string match -q -- '*/' "$result"; and set -- tail ''
+
+      set -l -- result (string escape -n -- $result)
+
+      string match -q -- '~*' "$token"
+      and set result (string replace -r -- '^\\\\~' '~' $result)
+
+      string match -q -- '$*' "$token"
+      and set result (string replace -r -- '^\\\\\$' '\$' $result)
+
+      commandline -rt -- (string join ' ' -- $result)$tail
+    end
+    commandline -f repaint
+  end
+
+  function _fzf_complete
+    set -l -- args (string escape -- $argv | string join ' ' | string split -- ' -- ')
+    set -l -- post_func (status function)_(string split -- ' ' $args[2])[1]_post
+    set -lx -- FZF_DEFAULT_OPTS (__fzf_defaults --reverse $FZF_COMPLETION_OPTS $args[1])
+    set -lx FZF_DEFAULT_OPTS_FILE
+    set -lx FZF_DEFAULT_COMMAND
+    set -l -- fzf_query (commandline -t | string escape)
+    set -l result
+    eval (__fzfcmd) --query=$fzf_query | while read -l r; set -a -- result $r; end
+    and if functions -q $post_func
+      commandline -rt -- (string collect -- $result | eval $post_func $args[2] | string join ' ')' '
+    else
+      commandline -rt -- (string join -- ' ' (string escape -- $result))' '
+    end
+    commandline -f repaint
+  end
+
+  # Kill completion (process selection)
+  function _fzf_complete_kill
+    set -l -- fzf_query (commandline -t | string escape)
+    set -lx -- FZF_DEFAULT_OPTS (__fzf_defaults --reverse $FZF_COMPLETION_OPTS \
+    --accept-nth=2 -m --header-lines=1 --no-preview --wrap)
+    set -lx FZF_DEFAULT_OPTS_FILE
+    if type -q ps
+      set -l -- ps_cmd 'begin command ps -eo user,pid,ppid,start,time,command 2>/dev/null;' \
+      'or command ps -eo user,pid,ppid,time,args 2>/dev/null;' \
+      'or command ps --everyone --full --windows 2>/dev/null; end'
+      set -l -- result (eval $ps_cmd \| (__fzfcmd) --query=$fzf_query)
+      and commandline -rt -- (string join ' ' -- $result)" "
+    else
+      __fzf_complete_native "kill " --multi --query=$fzf_query
+    end
+    commandline -f repaint
+  end
+
+  # Main completion function
+  function fzf-completion
+    set -l -- tokens (__fzf_cmd_tokens)
+    set -l -- current_token (commandline -t)
+    set -l -- cmd_name $tokens[1]
+
+    # Route to appropriate completion function
+    if test -n "$tokens"; and functions -q _fzf_complete_$cmd_name
+      _fzf_complete_$cmd_name $tokens
+    else
+      set -l -- fzf_opt --query=$current_token --multi
+      __fzf_complete_native "$tokens $current_token" $fzf_opt
+    end
+  end
+
+  # Bind Shift-Tab to fzf-completion (Tab retains native Fish behavior)
+  if test (string match -r -- '^\d+' $version) -ge 4
+    bind shift-tab fzf-completion
+    bind -M insert shift-tab fzf-completion
+  else
+    bind -k btab fzf-completion
+    bind -M insert -k btab fzf-completion
+  end
+end
+
+# Run setup
+fzf_completion_setup
diff --git a/shell/key-bindings.fish b/shell/key-bindings.fish
index 2b44dfd0..ed0219b7 100644
--- a/shell/key-bindings.fish
+++ b/shell/key-bindings.fish
@@ -30,9 +30,12 @@ function fzf_key_bindings
     return 1
   end
 
+#----BEGIN INCLUDE common.fish
+# NOTE: Do not directly edit this section, which is copied from "common.fish".
+# To modify it, one can edit "common.fish" and run "./update.sh" to apply
+# the changes. See code comments in "common.fish" for the implementation details.
+
   function __fzf_defaults
-    # $argv[1]: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
-    # $argv[2..]: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
     test -n "$FZF_TMUX_HEIGHT"; or set -l FZF_TMUX_HEIGHT 40%
     string join ' ' -- \
       "--height $FZF_TMUX_HEIGHT --min-height=20+ --bind=ctrl-z:ignore" $argv[1] \
@@ -51,17 +54,51 @@ function fzf_key_bindings
     end
   end
 
+  function __fzf_cmd_tokens -d 'Return command line tokens, skipping leading env assignments and command prefixes'
+    set -l tokens
+    if test (string match -r -- '^\d+' $version) -ge 4
+      set -- tokens (commandline -xpc)
+    else
+      set -- tokens (commandline -opc)
+    end
+
+    set -l -- var_count 0
+    for i in $tokens
+      if string match -qr -- '^[\w]+=' $i
+        set var_count (math $var_count + 1)
+      else
+        break
+      end
+    end
+    set -e -- tokens[0..$var_count]
+
+    while true
+      switch "$tokens[1]"
+        case builtin command
+          set -e -- tokens[1]
+          test "$tokens[1]" = "--"; and set -e -- tokens[1]
+        case env
+          set -e -- tokens[1]
+          test "$tokens[1]" = "--"; and set -e -- tokens[1]
+          while string match -qr -- '^[\w]+=' "$tokens[1]"
+            set -e -- tokens[1]
+          end
+        case '*'
+          break
+      end
+    end
+
+    string escape -n -- $tokens
+  end
+
   function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'
     set -l fzf_query ''
     set -l prefix ''
     set -l dir '.'
 
-    # Set variables containing the major and minor fish version numbers, using
-    # a method compatible with all supported fish versions.
     set -l -- fish_major (string match -r -- '^\d+' $version)
     set -l -- fish_minor (string match -r -- '^\d+\.(\d+)' $version)[2]
 
-    # fish v3.3.0 and newer: Don't use option prefix if " -- " is preceded.
     set -l -- match_regex '(?<fzf_query>[\s\S]*?(?=\n?$)$)'
     set -l -- prefix_regex '^-[^\s=]+=|^-(?!-)\S'
     if test "$fish_major" -eq 3 -a "$fish_minor" -lt 3
@@ -69,16 +106,12 @@ function fzf_key_bindings
       set -- match_regex "(?<prefix>$prefix_regex)?$match_regex"
     end
 
-    # Set $prefix and expanded $fzf_query with preserved trailing newlines.
     if test "$fish_major" -ge 4
-      # fish v4.0.0 and newer
       string match -q -r -- $match_regex (commandline --current-token --tokens-expanded | string collect -N)
     else if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
-      # fish v3.2.0 - v3.7.1 (last v3)
       string match -q -r -- $match_regex (commandline --current-token --tokenize | string collect -N)
       eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^\\\(?=~)|\\\(?=\$\w)' '')
     else
-      # fish older than v3.2.0 (v3.1b1 - v3.1.2)
       set -l -- cl_token (commandline --current-token --tokenize | string collect -N)
       set -- prefix (string match -r -- $prefix_regex $cl_token)
       set -- fzf_query (string replace -- "$prefix" '' $cl_token | string collect -N)
@@ -86,22 +119,17 @@ function fzf_key_bindings
     end
 
     if test -n "$fzf_query"
-      # Normalize path in $fzf_query, set $dir to the longest existing directory.
       if test \( "$fish_major" -ge 4 \) -o \( "$fish_major" -eq 3 -a "$fish_minor" -ge 5 \)
-        # fish v3.5.0 and newer
         set -- fzf_query (path normalize -- $fzf_query)
         set -- dir $fzf_query
         while not path is -d $dir
           set -- dir (path dirname $dir)
         end
       else
-        # fish older than v3.5.0 (v3.1b1 - v3.4.1)
         if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
-          # fish v3.2.0 - v3.4.1
           string match -q -r -- '(?<fzf_query>^[\s\S]*?(?=\n?$)$)' \
             (string replace -r -a -- '(?<=/)/|(?<!^)/+(?!\n)$' '' $fzf_query | string collect -N)
         else
-          # fish v3.1b1 - v3.1.2
           set -- fzf_query (string replace -r -a -- '(?<=/)/|(?<!^)/+(?!\n)$' '' $fzf_query | string collect -N)
           eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r '\\\n$' '')
         end
@@ -112,16 +140,12 @@ function fzf_key_bindings
       end
 
       if not string match -q -- '.' $dir; or string match -q -r -- '^\./|^\.$' $fzf_query
-        # Strip $dir from $fzf_query - preserve trailing newlines.
         if test "$fish_major" -ge 4
-          # fish v4.0.0 and newer
           string match -q -r -- '^'(string escape --style=regex -- $dir)'/?(?<fzf_query>[\s\S]*)' $fzf_query
         else if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
-          # fish v3.2.0 - v3.7.1 (last v3)
           string match -q -r -- '^/?(?<fzf_query>[\s\S]*?(?=\n?$)$)' \
             (string replace -- "$dir" '' $fzf_query | string collect -N)
         else
-          # fish older than v3.2.0 (v3.1b1 - v3.1.2)
           set -- fzf_query (string replace -- "$dir" '' $fzf_query | string collect -N)
           eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^/?|\\\n$' '')
         end
@@ -130,6 +154,7 @@ function fzf_key_bindings
 
     string escape -n -- "$dir" "$fzf_query" "$prefix"
   end
+#----END INCLUDE
 
   # Store current token in $dir as root for the 'find' command
   function fzf-file-widget -d "List files and folders"
@@ -140,13 +165,13 @@ function fzf_key_bindings
 
     set -lx FZF_DEFAULT_OPTS (__fzf_defaults \
       "--reverse --walker=file,dir,follow,hidden --scheme=path" \
-      "$FZF_CTRL_T_OPTS --multi --print0")
+      "--multi $FZF_CTRL_T_OPTS --print0")
 
     set -lx FZF_DEFAULT_COMMAND "$FZF_CTRL_T_COMMAND"
     set -lx FZF_DEFAULT_OPTS_FILE
 
     set -l result (eval (__fzfcmd) --walker-root=$dir --query=$fzf_query | string split0)
-    and commandline -rt -- (string join -- ' ' $prefix(string escape -- $result))' '
+    and commandline -rt -- (string join -- ' ' $prefix(string escape --no-quoted -- $result))' '
 
     commandline -f repaint
   end
@@ -234,3 +259,6 @@ function fzf_key_bindings
   end
 
 end
+
+# Run setup
+fzf_key_bindings
diff --git a/shell/update.sh b/shell/update.sh
index 61374d35..4734e807 100755
--- a/shell/update.sh
+++ b/shell/update.sh
@@ -8,24 +8,26 @@ dir=${0%"${0##*/}"}
 
 update() {
   {
-    sed -n '1,/^#----BEGIN INCLUDE common\.sh/p' "$1"
+    sed -n "1,/^#----BEGIN INCLUDE $1/p" "$2"
     cat << EOF
-# NOTE: Do not directly edit this section, which is copied from "common.sh".
-# To modify it, one can edit "common.sh" and run "./update.sh" to apply
-# the changes. See code comments in "common.sh" for the implementation details.
+# NOTE: Do not directly edit this section, which is copied from "$1".
+# To modify it, one can edit "$1" and run "./update.sh" to apply
+# the changes. See code comments in "$1" for the implementation details.
 EOF
     echo
-    grep -v '^[[:blank:]]*#' "$dir/common.sh" # remove code comments in common.sh
-    sed -n '/^#----END INCLUDE/,$p' "$1"
-  } > "$1.part"
+    grep -v '^[[:blank:]]*#' "$dir/$1" # remove code comments from the common file
+    sed -n '/^#----END INCLUDE/,$p' "$2"
+  } > "$2.part"
 
-  mv -f "$1.part" "$1"
+  mv -f "$2.part" "$2"
 }
 
-update "$dir/completion.bash"
-update "$dir/completion.zsh"
-update "$dir/key-bindings.bash"
-update "$dir/key-bindings.zsh"
+update "common.sh" "$dir/completion.bash"
+update "common.sh" "$dir/completion.zsh"
+update "common.sh" "$dir/key-bindings.bash"
+update "common.sh" "$dir/key-bindings.zsh"
+update "common.fish" "$dir/completion.fish"
+update "common.fish" "$dir/key-bindings.fish"
 
 # Check if --check is in ARGV
 check=0
diff --git a/test/lib/common.fish b/test/lib/common.fish
new file mode 100644
index 00000000..1192f8f1
--- /dev/null
+++ b/test/lib/common.fish
@@ -0,0 +1,17 @@
+# Unset fzf variables
+set -e FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS FZF_DEFAULT_OPTS_FILE FZF_TMUX FZF_TMUX_OPTS
+set -e FZF_CTRL_T_COMMAND FZF_CTRL_T_OPTS FZF_ALT_C_COMMAND FZF_ALT_C_OPTS FZF_CTRL_R_OPTS
+set -e FZF_API_KEY
+# Unset completion-specific variables
+set -e FZF_COMPLETION_TRIGGER FZF_COMPLETION_OPTS
+
+set -gx FZF_DEFAULT_OPTS "--no-scrollbar --pointer '>' --marker '>'"
+set -gx FZF_COMPLETION_TRIGGER '++'
+set -gx fish_history fzf_test
+
+# Add fzf to PATH
+fish_add_path <%= BASE %>/bin
+
+# Source key bindings and completion
+source "<%= BASE %>/shell/key-bindings.fish"
+source "<%= BASE %>/shell/completion.fish"
diff --git a/test/lib/common.rb b/test/lib/common.rb
index 0ddd3486..ef4dd915 100644
--- a/test/lib/common.rb
+++ b/test/lib/common.rb
@@ -11,6 +11,7 @@ require 'net/http'
 require 'json'
 
 TEMPLATE = File.read(File.expand_path('common.sh', __dir__))
+FISH_TEMPLATE = File.read(File.expand_path('common.fish', __dir__))
 UNSETS = %w[
   FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS
   FZF_TMUX FZF_TMUX_OPTS
@@ -66,7 +67,16 @@ class Shell
     end
 
     def fish
-      "unset #{UNSETS.join(' ')}; rm -f ~/.local/share/fish/fzf_test_history; FZF_DEFAULT_OPTS=\"--no-scrollbar --pointer '>' --marker '>'\" fish_history=fzf_test fish"
+      @fish ||=
+        begin
+          confdir = '/tmp/fzf-fish'
+          FileUtils.rm_rf(confdir)
+          FileUtils.mkdir_p("#{confdir}/fish/conf.d")
+          File.open("#{confdir}/fish/conf.d/fzf.fish", 'w') do |f|
+            f.puts ERB.new(FISH_TEMPLATE).result(binding)
+          end
+          "rm -f ~/.local/share/fish/fzf_test_history; XDG_CONFIG_HOME=#{confdir} fish"
+        end
     end
   end
 end
diff --git a/test/test_shell_integration.rb b/test/test_shell_integration.rb
index fa379fcb..f51d7195 100644
--- a/test/test_shell_integration.rb
+++ b/test/test_shell_integration.rb
@@ -27,6 +27,10 @@ module TestShell
     tmux.prepare
   end
 
+  def trigger
+    '**'
+  end
+
   def test_ctrl_t
     set_var('FZF_CTRL_T_COMMAND', 'seq 100')
 
@@ -165,7 +169,11 @@ module CompletionTest
       FileUtils.touch(File.expand_path(f))
     end
     tmux.prepare
-    tmux.send_keys 'cat /tmp/fzf-test/10**', :Tab
+    if shell == :fish
+      tmux.send_keys 'cat /tmp/fzf-test/10', 'C-t'
+    else
+      tmux.send_keys "cat /tmp/fzf-test/10#{trigger}", :Tab
+    end
     tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
     tmux.send_keys ' !d'
     tmux.until { |lines| assert_equal 2, lines.match_count }
@@ -179,7 +187,11 @@ module CompletionTest
     # ~USERNAME**<TAB>
     user = `whoami`.chomp
     tmux.send_keys 'C-u'
-    tmux.send_keys "cat ~#{user}**", :Tab
+    if shell == :fish
+      tmux.send_keys "cat ~#{user}", 'C-t'
+    else
+      tmux.send_keys "cat ~#{user}#{trigger}", :Tab
+    end
     tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
     tmux.send_keys "/#{user}"
     tmux.until { |lines| assert(lines.any? { |l| l.end_with?("/#{user}") }) }
@@ -190,14 +202,29 @@ module CompletionTest
 
     # ~INVALID_USERNAME**<TAB>
     tmux.send_keys 'C-u'
-    tmux.send_keys 'cat ~such**', :Tab
+    if shell == :fish
+      tmux.send_keys 'cat ~such', 'C-t'
+    else
+      tmux.send_keys "cat ~such#{trigger}", :Tab
+    end
     tmux.until(true) { |lines| assert lines.any_include?('no~such~user') }
     tmux.send_keys :Enter
-    tmux.until(true) { |lines| assert_equal 'cat no~such~user', lines[-1] }
+    tmux.until(true) do |lines|
+      if shell == :fish
+        # Fish's string escape quotes filenames with ~ to prevent tilde expansion
+        assert_equal 'cat no\\~such\\~user', lines[-1]
+      else
+        assert_equal 'cat no~such~user', lines[-1]
+      end
+    end
 
     # /tmp/fzf\ test**<TAB>
     tmux.send_keys 'C-u'
-    tmux.send_keys 'cat /tmp/fzf\ test/**', :Tab
+    if shell == :fish
+      tmux.send_keys 'cat /tmp/fzf\\ test/', 'C-t'
+    else
+      tmux.send_keys "cat /tmp/fzf\\ test/#{trigger}", :Tab
+    end
     tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
     tmux.send_keys 'foobar$'
     tmux.until do |lines|
@@ -210,7 +237,11 @@ module CompletionTest
     # Should include hidden files
     (1..100).each { |i| FileUtils.touch("/tmp/fzf-test/.hidden-#{i}") }
     tmux.send_keys 'C-u'
-    tmux.send_keys 'cat /tmp/fzf-test/hidden**', :Tab
+    if shell == :fish
+      tmux.send_keys 'cat /tmp/fzf-test/hidden', 'C-t'
+    else
+      tmux.send_keys "cat /tmp/fzf-test/hidden#{trigger}", :Tab
+    end
     tmux.until(true) do |lines|
       assert_equal 100, lines.match_count
       assert lines.any_include?('/tmp/fzf-test/.hidden-')
@@ -223,70 +254,89 @@ module CompletionTest
   end
 
   def test_file_completion_root
-    tmux.send_keys 'ls /**', :Tab
+    if shell == :fish
+      tmux.send_keys 'ls /', 'C-t'
+    else
+      tmux.send_keys "ls /#{trigger}", :Tab
+    end
     tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
     tmux.send_keys :Enter
   end
 
   def test_dir_completion
+    FileUtils.mkdir_p('/tmp/fzf-test-dir')
     (1..100).each do |idx|
-      FileUtils.mkdir_p("/tmp/fzf-test/d#{idx}")
+      FileUtils.mkdir_p("/tmp/fzf-test-dir/d#{idx}")
     end
-    FileUtils.touch('/tmp/fzf-test/d55/xxx')
+    FileUtils.touch('/tmp/fzf-test-dir/d55/xxx')
     tmux.prepare
-    tmux.send_keys 'cd /tmp/fzf-test/**', :Tab
+    if shell == :fish
+      tmux.send_keys 'cd /tmp/fzf-test-dir/', 'C-t'
+    else
+      tmux.send_keys "cd /tmp/fzf-test-dir/#{trigger}", :Tab
+    end
     tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
-    tmux.send_keys :Tab, :Tab # Tab does not work here
-    tmux.send_keys 55
+    # Tab selects items in C-t's --multi mode, so skip for fish
+    tmux.send_keys :Tab, :Tab unless shell == :fish # Tab does not work here
+    tmux.send_keys '55/$'
     tmux.until do |lines|
       assert_equal 1, lines.match_count
-      assert_includes lines, '> 55'
-      assert_includes lines, '> /tmp/fzf-test/d55/'
+      assert_includes lines, '> 55/$'
+      assert_includes lines, '> /tmp/fzf-test-dir/d55/'
     end
     tmux.send_keys :Enter
-    tmux.until(true) { |lines| assert_equal 'cd /tmp/fzf-test/d55/', lines[-1] }
+    tmux.until(true) { |lines| assert_equal 'cd /tmp/fzf-test-dir/d55/', lines[-1] }
+    # C-t appends a trailing space after the result
+    tmux.send_keys :BSpace if shell == :fish
     tmux.send_keys :xx
-    tmux.until { |lines| assert_equal 'cd /tmp/fzf-test/d55/xx', lines[-1] }
+    tmux.until { |lines| assert_equal 'cd /tmp/fzf-test-dir/d55/xx', lines[-1] }
 
     # Should not match regular files (bash-only)
     if instance_of?(TestBash)
       tmux.send_keys :Tab
-      tmux.until { |lines| assert_equal 'cd /tmp/fzf-test/d55/xx', lines[-1] }
+      tmux.until { |lines| assert_equal 'cd /tmp/fzf-test-dir/d55/xx', lines[-1] }
     end
 
     # Fail back to plusdirs
     tmux.send_keys :BSpace, :BSpace, :BSpace
-    tmux.until { |lines| assert_equal 'cd /tmp/fzf-test/d55', lines[-1] }
+    tmux.until { |lines| assert_equal 'cd /tmp/fzf-test-dir/d55', lines[-1] }
     tmux.send_keys :Tab
-    tmux.until { |lines| assert_equal 'cd /tmp/fzf-test/d55/', lines[-1] }
+    tmux.until { |lines| assert_equal 'cd /tmp/fzf-test-dir/d55/', lines[-1] }
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-dir')
   end
 
   def test_process_completion
-    tmux.send_keys 'sleep 12345 &', :Enter
-    lines = tmux.until { |lines| assert lines[-1]&.start_with?('[1] ') }
-    pid = lines[-1]&.split&.last
-    tmux.prepare
-    tmux.send_keys 'C-L'
-    tmux.send_keys 'kill **', :Tab
-    tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
-    tmux.send_keys 'sleep12345'
-    tmux.until { |lines| assert lines.any_include?('sleep 12345') }
-    tmux.send_keys :Enter
-    tmux.until(true) { |lines| assert_equal "kill #{pid}", lines[-1] }
-  ensure
-    if pid
-      begin
-        Process.kill('KILL', pid.to_i)
-      rescue StandardError
-        nil
+    skip('fish background job format differs') if shell == :fish
+
+    begin
+      tmux.send_keys 'sleep 12345 &', :Enter
+      lines = tmux.until { |lines| assert lines[-1]&.start_with?('[1] ') }
+      pid = lines[-1]&.split&.last
+      tmux.prepare
+      tmux.send_keys 'C-L'
+      tmux.send_keys "kill #{trigger}", :Tab
+      tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
+      tmux.send_keys 'sleep12345'
+      tmux.until { |lines| assert lines.any_include?('sleep 12345') }
+      tmux.send_keys :Enter
+      tmux.until(true) { |lines| assert_equal "kill #{pid}", lines[-1] }
+    ensure
+      if pid
+        begin
+          Process.kill('KILL', pid.to_i)
+        rescue StandardError
+          nil
+        end
       end
     end
   end
 
   def test_custom_completion
+    skip('fish does not use _fzf_compgen_path; path completion is via ctrl-t') if shell == :fish
     tmux.send_keys '_fzf_compgen_path() { echo "$1"; seq 10; }', :Enter
     tmux.prepare
-    tmux.send_keys 'ls /tmp/**', :Tab
+    tmux.send_keys "ls /tmp/#{trigger}", :Tab
     tmux.until { |lines| assert_equal 11, lines.match_count }
     tmux.send_keys :Tab, :Tab, :Tab
     tmux.until { |lines| assert_equal 3, lines.select_count }
@@ -295,11 +345,12 @@ module CompletionTest
   end
 
   def test_unset_completion
+    skip('fish has native completion for set and unset variables') if shell == :fish
     tmux.send_keys 'export FZFFOOBAR=BAZ', :Enter
     tmux.prepare
 
     # Using tmux
-    tmux.send_keys 'unset FZFFOOBR**', :Tab
+    tmux.send_keys "unset FZFFOOBR#{trigger}", :Tab
     tmux.until { |lines| assert_equal 1, lines.match_count }
     tmux.send_keys :Enter
     tmux.until { |lines| assert_equal 'unset FZFFOOBAR', lines[-1] }
@@ -308,34 +359,57 @@ module CompletionTest
     # FZF_TMUX=1
     new_shell
     tmux.focus
-    tmux.send_keys 'unset FZFFOOBR**', :Tab
+    tmux.send_keys "unset FZFFOOBR#{trigger}", :Tab
     tmux.until { |lines| assert_equal 1, lines.match_count }
     tmux.send_keys :Enter
     tmux.until { |lines| assert_equal 'unset FZFFOOBAR', lines[-1] }
   end
 
   def test_completion_in_command_sequence
-    tmux.send_keys 'export FZFFOOBAR=BAZ', :Enter
-    tmux.prepare
-
-    triggers = ['**', '~~', '++', 'ff', '/']
-    triggers.push('&', '[', ';', '`') if instance_of?(TestZsh)
-
-    triggers.each do |trigger|
-      set_var('FZF_COMPLETION_TRIGGER', trigger)
-      command = "echo foo; QUX=THUD unset FZFFOOBR#{trigger}"
-      tmux.send_keys command.sub(/(;|`)$/, '\\\\\1'), :Tab
+    if shell == :fish
+      FileUtils.mkdir_p('/tmp/fzf-test-seq')
+      FileUtils.touch('/tmp/fzf-test-seq/fzffoobar')
+      tmux.prepare
+      # Fish uses Shift-Tab for fzf completion (no trigger system)
+      command = 'echo foo; QUX=THUD ls /tmp/fzf-test-seq/fzffoobr'
+      expected = 'echo foo; QUX=THUD ls /tmp/fzf-test-seq/fzffoobar'
+      tmux.send_keys command, :BTab
       tmux.until { |lines| assert_equal 1, lines.match_count }
       tmux.send_keys :Enter
-      tmux.until { |lines| assert_equal 'echo foo; QUX=THUD unset FZFFOOBAR', lines[-1] }
+      tmux.until { |lines| assert_equal expected, lines[-1] }
+    else
+      tmux.send_keys 'export FZFFOOBAR=BAZ', :Enter
+      tmux.prepare
+
+      triggers = ['**', '~~', '++', 'ff', '/']
+      triggers.push('&', '[', ';', '`') if instance_of?(TestZsh)
+
+      triggers.each do |trigger|
+        set_var('FZF_COMPLETION_TRIGGER', trigger)
+        command = "echo foo; QUX=THUD unset FZFFOOBR#{trigger}"
+        expected = 'echo foo; QUX=THUD unset FZFFOOBAR'
+        tmux.send_keys command.sub(/(;|`)$/, '\\\\\1'), :Tab
+        tmux.until { |lines| assert_equal 1, lines.match_count }
+        tmux.send_keys :Enter
+        tmux.until { |lines| assert_equal expected, lines[-1] }
+      end
     end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-seq') if shell == :fish
   end
 
   def test_file_completion_unicode
     FileUtils.mkdir_p('/tmp/fzf-test')
-    tmux.paste "cd /tmp/fzf-test; echo test3 > $'fzf-unicode \\355\\205\\214\\354\\212\\244\\355\\212\\2701'; echo test4 > $'fzf-unicode \\355\\205\\214\\354\\212\\244\\355\\212\\2702'"
+    # Shell-agnostic file creation
+    File.write('/tmp/fzf-test/fzf-unicode 테스트1', "test3\n")
+    File.write('/tmp/fzf-test/fzf-unicode 테스트2', "test4\n")
+    tmux.send_keys 'cd /tmp/fzf-test', :Enter
     tmux.prepare
-    tmux.send_keys 'cat fzf-unicode**', :Tab
+    if shell == :fish
+      tmux.send_keys 'cat fzf-unicode', 'C-t'
+    else
+      tmux.send_keys "cat fzf-unicode#{trigger}", :Tab
+    end
     tmux.until { |lines| assert_equal 2, lines.match_count }
 
     tmux.send_keys '1'
@@ -358,36 +432,41 @@ module CompletionTest
   end
 
   def test_custom_completion_api
-    tmux.send_keys 'eval "_fzf$(declare -f _comprun)"', :Enter
-    %w[f g].each do |command|
-      tmux.prepare
-      tmux.send_keys "#{command} b**", :Tab
-      tmux.until do |lines|
-        assert_equal 2, lines.item_count
-        assert_equal 1, lines.match_count
-        assert lines.any_include?("prompt-#{command}")
-        assert lines.any_include?("preview-#{command}-bar")
+    skip('bash-specific _comprun/declare syntax') if shell == :fish
+
+    begin
+      tmux.send_keys 'eval "_fzf$(declare -f _comprun)"', :Enter
+      %w[f g].each do |command|
+        tmux.prepare
+        tmux.send_keys "#{command} b#{trigger}", :Tab
+        tmux.until do |lines|
+          assert_equal 2, lines.item_count
+          assert_equal 1, lines.match_count
+          assert lines.any_include?("prompt-#{command}")
+          assert lines.any_include?("preview-#{command}-bar")
+        end
+        tmux.send_keys :Enter
+        tmux.until { |lines| assert_equal "#{command} #{command}barbar", lines[-1] }
+        tmux.send_keys 'C-u'
       end
-      tmux.send_keys :Enter
-      tmux.until { |lines| assert_equal "#{command} #{command}barbar", lines[-1] }
-      tmux.send_keys 'C-u'
+    ensure
+      tmux.prepare
+      tmux.send_keys 'unset -f _fzf_comprun', :Enter
     end
-  ensure
-    tmux.prepare
-    tmux.send_keys 'unset -f _fzf_comprun', :Enter
   end
 
   def test_ssh_completion
+    skip('fish uses native ssh completion') if shell == :fish
     (1..5).each { |i| FileUtils.touch("/tmp/fzf-test-ssh-#{i}") }
 
-    tmux.send_keys 'ssh jg@localhost**', :Tab
+    tmux.send_keys "ssh jg@localhost#{trigger}", :Tab
     tmux.until do |lines|
       assert_operator lines.match_count, :>=, 1
     end
 
     tmux.send_keys :Enter
     tmux.until { |lines| assert lines.any_include?('ssh jg@localhost') }
-    tmux.send_keys ' -i /tmp/fzf-test-ssh**', :Tab
+    tmux.send_keys " -i /tmp/fzf-test-ssh#{trigger}", :Tab
     tmux.until do |lines|
       assert_operator lines.match_count, :>=, 5
       assert_equal 0, lines.select_count
@@ -399,11 +478,344 @@ module CompletionTest
     tmux.send_keys :Enter
     tmux.until { |lines| assert lines.any_include?('ssh jg@localhost  -i /tmp/fzf-test-ssh-') }
 
-    tmux.send_keys 'localhost**', :Tab
+    tmux.send_keys "localhost#{trigger}", :Tab
     tmux.until do |lines|
       assert_operator lines.match_count, :>=, 1
     end
   end
+
+  def test_option_equals_long_option
+    FileUtils.mkdir_p('/tmp/fzf-test-opt-eq-long')
+    FileUtils.touch('/tmp/fzf-test-opt-eq-long/SECURITY.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-opt-eq-long', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'some-command --opt=SECURI', 'C-t'
+    else
+      tmux.send_keys "some-command --opt=SECURI#{trigger}", :Tab
+    end
+
+    case shell
+    when :bash
+      tmux.until do |lines|
+        assert_equal 1, lines.match_count
+        assert_includes lines, '> SECURI'
+      end
+      tmux.send_keys :Enter
+      tmux.until(true) { |lines| assert_equal 'some-command --opt=SECURITY.md', lines[-1] }
+    when :fish
+      tmux.until do |lines|
+        assert_equal 1, lines.match_count
+        assert lines.any_include?('SECURITY.md')
+      end
+      tmux.send_keys :Enter
+      tmux.until(true) { |lines| assert_equal 'some-command --opt=SECURITY.md', lines[-1] }
+    when :zsh
+      tmux.until do |lines|
+        assert_equal 0, lines.match_count
+        assert_includes lines, '> --opt=SECURI'
+      end
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-opt-eq-long')
+  end
+
+  def test_option_equals_long_option_after_double_dash
+    FileUtils.mkdir_p('/tmp/fzf-test-opt-eq-long-ddash')
+    FileUtils.touch('/tmp/fzf-test-opt-eq-long-ddash/SECURITY.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-opt-eq-long-ddash', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'some-command -- --opt=SECURI', 'C-t'
+    else
+      tmux.send_keys "some-command -- --opt=SECURI#{trigger}", :Tab
+    end
+
+    case shell
+    when :bash
+      tmux.until do |lines|
+        assert_equal 1, lines.match_count
+        assert_includes lines, '> SECURI'
+      end
+      tmux.send_keys :Enter
+      tmux.until(true) { |lines| assert_equal 'some-command -- --opt=SECURITY.md', lines[-1] }
+    when :fish, :zsh
+      tmux.until do |lines|
+        assert_equal 0, lines.match_count
+        assert_includes lines, '> --opt=SECURI'
+      end
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-opt-eq-long-ddash')
+  end
+
+  def test_option_equals_short_option
+    FileUtils.mkdir_p('/tmp/fzf-test-opt-eq-short')
+    FileUtils.touch('/tmp/fzf-test-opt-eq-short/SECURITY.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-opt-eq-short', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'some-command -o=SECURI', 'C-t'
+    else
+      tmux.send_keys "some-command -o=SECURI#{trigger}", :Tab
+    end
+
+    case shell
+    when :bash, :fish
+      tmux.until do |lines|
+        assert_equal 1, lines.match_count
+        assert lines.any_include?('> SECURITY.md')
+      end
+      tmux.send_keys :Enter
+      tmux.until(true) { |lines| assert_equal 'some-command -o=SECURITY.md', lines[-1] }
+    when :zsh
+      tmux.until do |lines|
+        assert_equal 0, lines.match_count
+        assert_includes lines, '> -o=SECURI'
+      end
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-opt-eq-short')
+  end
+
+  def test_option_equals_short_option_after_double_dash
+    FileUtils.mkdir_p('/tmp/fzf-test-opt-eq-short-ddash')
+    FileUtils.touch('/tmp/fzf-test-opt-eq-short-ddash/SECURITY.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-opt-eq-short-ddash', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'some-command -- -o=SECURI', 'C-t'
+    else
+      tmux.send_keys "some-command -- -o=SECURI#{trigger}", :Tab
+    end
+
+    case shell
+    when :bash
+      tmux.until do |lines|
+        assert_equal 1, lines.match_count
+        assert_includes lines, '> SECURITY.md'
+      end
+      tmux.send_keys :Enter
+      tmux.until(true) { |lines| assert_equal 'some-command -- -o=SECURITY.md', lines[-1] }
+    when :fish, :zsh
+      tmux.until do |lines|
+        assert_equal 0, lines.match_count
+        assert_includes lines, '> -o=SECURI'
+      end
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-opt-eq-short-ddash')
+  end
+
+  def test_option_no_equals_long_option
+    FileUtils.mkdir_p('/tmp/fzf-test-opt-no-eq-long')
+    FileUtils.touch('/tmp/fzf-test-opt-no-eq-long/SECURITY.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-opt-no-eq-long', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'some-command --optSECURI', 'C-t'
+    else
+      tmux.send_keys "some-command --optSECURI#{trigger}", :Tab
+    end
+
+    tmux.until do |lines|
+      assert_equal 0, lines.match_count
+      assert_includes lines, '> --optSECURI'
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-opt-no-eq-long')
+  end
+
+  def test_option_no_equals_long_option_after_double_dash
+    FileUtils.mkdir_p('/tmp/fzf-test-opt-no-eq-long-ddash')
+    FileUtils.touch('/tmp/fzf-test-opt-no-eq-long-ddash/SECURITY.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-opt-no-eq-long-ddash', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'some-command -- --optSECURI', 'C-t'
+    else
+      tmux.send_keys "some-command -- --optSECURI#{trigger}", :Tab
+    end
+
+    tmux.until do |lines|
+      assert_equal 0, lines.match_count
+      assert_includes lines, '> --optSECURI'
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-opt-no-eq-long-ddash')
+  end
+
+  def test_option_no_equals_short_option
+    FileUtils.mkdir_p('/tmp/fzf-test-opt-no-eq-short')
+    FileUtils.touch('/tmp/fzf-test-opt-no-eq-short/SECURITY.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-opt-no-eq-short', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'some-command -oSECURI', 'C-t'
+    else
+      tmux.send_keys "some-command -oSECURI#{trigger}", :Tab
+    end
+
+    case shell
+    when :bash, :zsh
+      tmux.until do |lines|
+        assert_equal 0, lines.match_count
+        assert_includes lines, '> -oSECURI'
+      end
+    when :fish
+      tmux.until do |lines|
+        assert_equal 1, lines.match_count
+        assert lines.any_include?('> SECURITY.md')
+      end
+      tmux.send_keys :Enter
+      tmux.until(true) { |lines| assert_equal 'some-command -oSECURITY.md', lines[-1] }
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-opt-no-eq-short')
+  end
+
+  def test_option_no_equals_short_option_after_double_dash
+    FileUtils.mkdir_p('/tmp/fzf-test-opt-no-eq-short-ddash')
+    FileUtils.touch('/tmp/fzf-test-opt-no-eq-short-ddash/SECURITY.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-opt-no-eq-short-ddash', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'some-command -- -oSECURI', 'C-t'
+    else
+      tmux.send_keys "some-command -- -oSECURI#{trigger}", :Tab
+    end
+
+    tmux.until do |lines|
+      assert_equal 0, lines.match_count
+      assert_includes lines, '> -oSECURI'
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-opt-no-eq-short-ddash')
+  end
+
+  def test_filename_with_newline
+    FileUtils.mkdir_p('/tmp/fzf-test-newline')
+    FileUtils.touch("/tmp/fzf-test-newline/xyz\nwith\nnewlines")
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-newline', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'cat xyz', 'C-t'
+    else
+      tmux.send_keys "cat xyz#{trigger}", :Tab
+    end
+
+    case shell
+    when :fish
+      tmux.until do |lines|
+        assert_equal 1, lines.match_count
+        assert_includes lines, '> xyz'
+      end
+      tmux.send_keys :Enter
+      # fish escapes newlines in filenames
+      tmux.until(true) { |lines| assert_equal 'cat xyz\\nwith\\nnewlines', lines[-1] }
+    when :bash, :zsh
+      tmux.until do |lines|
+        assert_equal 1, lines.match_count
+        assert_includes lines, '> xyz'
+      end
+      tmux.send_keys :Enter
+      # bash and zsh replace newlines with spaces in filenames
+      tmux.until(true) { |lines| assert_equal 'cat xyz with newlines', lines[-1] }
+    end
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-newline')
+  end
+
+  def test_path_with_special_chars
+    FileUtils.mkdir_p('/tmp/fzf-test-[special]')
+    FileUtils.touch('/tmp/fzf-test-[special]/xyz123')
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'ls /tmp/fzf-test-\[special\]/xyz', 'C-t'
+    else
+      tmux.send_keys "ls /tmp/fzf-test-\\[special\\]/xyz#{trigger}", :Tab
+    end
+    tmux.until { |lines| assert_equal 1, lines.match_count }
+    tmux.send_keys :Enter
+    tmux.until(true) { |lines| assert_equal 'ls /tmp/fzf-test-\\[special\\]/xyz123', lines[-1] }
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-[special]')
+  end
+
+  def test_query_with_dollar_anchor
+    FileUtils.mkdir_p('/tmp/fzf-test-dollar-anchor')
+    FileUtils.touch('/tmp/fzf-test-dollar-anchor/file.txt')
+    FileUtils.touch('/tmp/fzf-test-dollar-anchor/filetxt.md')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-dollar-anchor', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'ls txt$', 'C-t'
+    else
+      tmux.send_keys "ls txt$#{trigger}", :Tab
+    end
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_includes lines, '> txt$'
+    end
+    tmux.send_keys :Enter
+    tmux.until(true) { |lines| assert_equal 'ls file.txt', lines[-1] }
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-dollar-anchor')
+  end
+
+  def test_single_flag_completion
+    FileUtils.mkdir_p('/tmp/fzf-test-single-flag')
+    FileUtils.touch('/tmp/fzf-test-single-flag/-testfile.txt')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-single-flag', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'ls -', 'C-t'
+    else
+      tmux.send_keys "ls -#{trigger}", :Tab
+    end
+
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_includes lines, '> -'
+    end
+    tmux.send_keys :Enter
+    tmux.until(true) { |lines| assert_equal 'ls -testfile.txt', lines[-1] }
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-single-flag')
+  end
+
+  def test_double_flag_completion
+    FileUtils.mkdir_p('/tmp/fzf-test-double-flag')
+    FileUtils.touch('/tmp/fzf-test-double-flag/--testfile.txt')
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test-double-flag', :Enter
+    tmux.prepare
+    if shell == :fish
+      tmux.send_keys 'ls --', 'C-t'
+    else
+      tmux.send_keys "ls --#{trigger}", :Tab
+    end
+
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_includes lines, '> --'
+    end
+    tmux.send_keys :Enter
+    tmux.until(true) { |lines| assert_equal 'ls --testfile.txt', lines[-1] }
+  ensure
+    FileUtils.rm_rf('/tmp/fzf-test-double-flag')
+  end
 end
 
 class TestBash < TestBase
@@ -424,7 +836,7 @@ class TestBash < TestBase
     tmux.paste 'touch /tmp/foo; _fzf_completion_loader=1'
     tmux.paste '_completion_loader() { complete -o default fake; }'
     tmux.paste 'complete -F _fzf_path_completion -o default -o bashdefault fake'
-    tmux.send_keys 'fake /tmp/foo**', :Tab
+    tmux.send_keys "fake /tmp/foo#{trigger}", :Tab
     tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
     tmux.send_keys 'C-c'
 
@@ -433,7 +845,7 @@ class TestBash < TestBase
     tmux.send_keys :Tab, 'C-u'
 
     tmux.prepare
-    tmux.send_keys 'fake /tmp/foo**', :Tab
+    tmux.send_keys "fake /tmp/foo#{trigger}", :Tab
     tmux.until { |lines| assert_operator lines.match_count, :>, 0 }
   end
 end
@@ -455,7 +867,7 @@ class TestZsh < TestBase
     tmux.send_keys 'export FZFFOOBAR=BAZ', :Enter
     ['unset', '\unset', "'unset'"].each do |command|
       tmux.prepare
-      tmux.send_keys "#{command} FZFFOOBR**", :Tab
+      tmux.send_keys "#{command} FZFFOOBR#{trigger}", :Tab
       tmux.until { |lines| assert_equal 1, lines.match_count }
       tmux.send_keys :Enter
       tmux.until { |lines| assert_equal "#{command} FZFFOOBAR", lines[-1] }
@@ -579,13 +991,18 @@ end
 
 class TestFish < TestBase
   include TestShell
+  include CompletionTest
 
   def shell
     :fish
   end
 
+  def trigger
+    '++'
+  end
+
   def new_shell
-    tmux.send_keys 'env FZF_TMUX=1 FZF_DEFAULT_OPTS=--no-scrollbar fish', :Enter
+    tmux.send_keys 'env FZF_TMUX=1 XDG_CONFIG_HOME=/tmp/fzf-fish fish', :Enter
     tmux.send_keys 'function fish_prompt; end; clear', :Enter
     tmux.until { |lines| assert_empty lines }
   end
diff --git a/uninstall b/uninstall
index 76950ef1..7882cf5c 100755
--- a/uninstall
+++ b/uninstall
@@ -33,6 +33,9 @@ for opt in "$@"; do
   esac
 done
 
+cd "$(dirname "${BASH_SOURCE[0]}")"
+fzf_base=$(pwd)
+
 ask() {
   while true; do
     read -p "$1 ([y]/n) " -r
@@ -94,12 +97,15 @@ done
 bind_file="${fish_dir}/functions/fish_user_key_bindings.fish"
 if [ -f "$bind_file" ]; then
   remove_line "$bind_file" "fzf_key_bindings"
+  remove_line "$bind_file" "fzf_completion_setup"
   remove_line "$bind_file" "fzf --fish | source"
 fi
 
 if [ -d "${fish_dir}/functions" ]; then
   remove "${fish_dir}/functions/fzf.fish"
   remove "${fish_dir}/functions/fzf_key_bindings.fish"
+  remove_line "$bind_file" "source \"${fzf_base}/shell/completion.fish\""
+  remove_line "$bind_file" "source \"${fzf_base}/shell/key-bindings.fish\""
 
   if [ -z "$(ls -A "${fish_dir}/functions")" ]; then
     rmdir "${fish_dir}/functions"