diff --git a/jedi/parsing.py b/jedi/parsing.py
index b3f20e92..b6ab611b 100644
--- a/jedi/parsing.py
+++ b/jedi/parsing.py
@@ -1508,7 +1508,7 @@ class PyFuzzyParser(object):
                                 string += ' '
                             string += ".".join(n.names)
                         continue
-                elif '=' in tok and not tok in ['>=', '<=', '==', '!=']:
+                elif tok.endswith('=') and not tok in ['>=', '<=', '==', '!=']:
                     # there has been an assignement -> change vars
                     if level == 0:
                         set_vars = used_vars
diff --git a/test/completion/types.py b/test/completion/types.py
index a29c1511..04c17c95 100644
--- a/test/completion/types.py
+++ b/test/completion/types.py
@@ -23,6 +23,9 @@ r"".upper
 # strangely this didn't work, because the = is used for assignments
 #? ['upper']
 "=".upper
+a = "="
+#? ['upper']
+a.upper
 
 
 # -----------------