diff --git a/ale_linters/c/cquery.vim b/ale_linters/c/cquery.vim
index 7daf9f76..a20782a2 100644
--- a/ale_linters/c/cquery.vim
+++ b/ale_linters/c/cquery.vim
@@ -6,6 +6,11 @@ call ale#Set('c_cquery_cache_directory', expand('~/.cache/cquery'))
 
 function! ale_linters#c#cquery#GetProjectRoot(buffer) abort
     let l:project_root = ale#path#FindNearestFile(a:buffer, 'compile_commands.json')
+
+    if empty(l:project_root)
+        let l:project_root = ale#path#FindNearestFile(a:buffer, '.cquery')
+    endif
+
     return !empty(l:project_root) ? fnamemodify(l:project_root, ':h') : ''
 endfunction
 
diff --git a/ale_linters/cpp/cquery.vim b/ale_linters/cpp/cquery.vim
index 39eebce3..b1c81989 100644
--- a/ale_linters/cpp/cquery.vim
+++ b/ale_linters/cpp/cquery.vim
@@ -7,6 +7,10 @@ call ale#Set('cpp_cquery_cache_directory', expand('~/.cache/cquery'))
 function! ale_linters#cpp#cquery#GetProjectRoot(buffer) abort
     let l:project_root = ale#path#FindNearestFile(a:buffer, 'compile_commands.json')
 
+    if empty(l:project_root)
+        let l:project_root = ale#path#FindNearestFile(a:buffer, '.cquery')
+    endif
+
     return !empty(l:project_root) ? fnamemodify(l:project_root, ':h') : ''
 endfunction
 
diff --git a/test/command_callback/cquery_paths/with_compile_commands_json/compile_commands.json b/test/command_callback/cquery_paths/with_compile_commands_json/compile_commands.json
new file mode 100644
index 00000000..e69de29b
diff --git a/test/command_callback/cquery_paths/with_cquery/.cquery b/test/command_callback/cquery_paths/with_cquery/.cquery
new file mode 100644
index 00000000..e69de29b
diff --git a/test/command_callback/test_c_cquery_command_callbacks.vader b/test/command_callback/test_c_cquery_command_callbacks.vader
new file mode 100644
index 00000000..13b7a567
--- /dev/null
+++ b/test/command_callback/test_c_cquery_command_callbacks.vader
@@ -0,0 +1,33 @@
+Before:
+  call ale#assert#SetUpLinterTest('c', 'cquery')
+
+After:
+  call ale#assert#TearDownLinterTest()
+
+Execute(The project root should be detected correctly using compile_commands.json file):
+  AssertLSPProject ''
+
+  call ale#test#SetFilename('cquery_paths/with_compile_commands_json/dummy.c')
+
+  AssertLSPProject ale#path#Simplify(g:dir . '/cquery_paths/with_compile_commands_json')
+
+Execute(The project root should be detected correctly using .cquery file):
+  AssertLSPProject ''
+
+  call ale#test#SetFilename('cquery_paths/with_cquery/dummy.c')
+
+  AssertLSPProject ale#path#Simplify(g:dir . '/cquery_paths/with_cquery')
+
+Execute(The executable should be configurable):
+  AssertLinter 'cquery', ale#Escape('cquery')
+
+  let b:ale_c_cquery_executable = 'foobar'
+
+  AssertLinter 'foobar', ale#Escape('foobar')
+
+Execute(The cache directory should be configurable):
+  AssertLSPOptions {'cacheDirectory': expand('$HOME/.cache/cquery')}
+
+  let b:ale_c_cquery_cache_directory = '/foo/bar'
+
+  AssertLSPOptions {'cacheDirectory': '/foo/bar'}
diff --git a/test/command_callback/test_cpp_cquery_command_callbacks.vader b/test/command_callback/test_cpp_cquery_command_callbacks.vader
index b355d052..682c90d5 100644
--- a/test/command_callback/test_cpp_cquery_command_callbacks.vader
+++ b/test/command_callback/test_cpp_cquery_command_callbacks.vader
@@ -7,6 +7,20 @@ Before:
 After:
   call ale#assert#TearDownLinterTest()
 
+Execute(The project root should be detected correctly using compile_commands.json file):
+  AssertLSPProject ''
+
+  call ale#test#SetFilename('cquery_paths/with_compile_commands_json/dummy.cpp')
+
+  AssertLSPProject ale#path#Simplify(g:dir . '/cquery_paths/with_compile_commands_json')
+
+Execute(The project root should be detected correctly using .cquery file):
+  AssertLSPProject ''
+
+  call ale#test#SetFilename('cquery_paths/with_cquery/dummy.cpp')
+
+  AssertLSPProject ale#path#Simplify(g:dir . '/cquery_paths/with_cquery')
+
 Execute(The executable should be configurable):
   AssertLinter 'cquery', ale#Escape('cquery')