diff --git a/test/regression.py b/test/regression.py
index 6e78eccd..6b939064 100755
--- a/test/regression.py
+++ b/test/regression.py
@@ -10,6 +10,7 @@ import time
 import functools
 import itertools
 import os
+import textwrap
 
 from base import TestBase, cwd_at
 
@@ -95,6 +96,31 @@ class TestRegression(TestBase):
         if not is_py25:
             assert len(r[0].doc) > 100
 
+    def definition_when_in_function_call(self, pre_cursor, post_cursor=''):
+        source = textwrap.dedent("""
+        def f():
+            pass
+        %s%s""" % (pre_cursor, post_cursor))
+        lines = source.splitlines()
+        pos = (len(lines), len(pre_cursor))
+        return list(self.definition(source, pos))
+
+    def test_definition_when_in_function_call_right_after_open_paren(self):
+        defs = self.definition_when_in_function_call('f(')
+        self.assertEqual(defs[0].description, 'def f')
+
+    def test_definition_when_in_function_call_after_open_paren_and_space(self):
+        defs = self.definition_when_in_function_call('f( ')
+        self.assertEqual(defs[0].description, 'def f')
+
+    def test_definition_when_in_function_call_right_after_comma(self):
+        defs = self.definition_when_in_function_call('f(1,')
+        self.assertEqual(defs[0].description, 'def f')
+
+    def test_definition_when_in_function_call_after_comma_and_space(self):
+        defs = self.definition_when_in_function_call('f(1, ')
+        self.assertEqual(defs[0].description, 'def f')
+
     def test_function_call_signature(self):
         defs = self.definition("""
         def f(x, y=1, z='a'):