diff --git a/test/test_compiled.py b/test/test_compiled.py
index c783a3e2..0c266897 100644
--- a/test/test_compiled.py
+++ b/test/test_compiled.py
@@ -10,10 +10,24 @@ from .helpers import cwd_at
 
 
 @cwd_at('test/extensions')
-def test_compiled():
+def test_completions():
     if platform.architecture()[0] == '64bit':
         package_name = "compiled%s%s" % sys.version_info[:2]
         sys.path.insert(0, os.getcwd())
         if os.path.exists(package_name):
             s = jedi.Script("from %s import compiled; compiled." % package_name)
             assert len(s.completions()) >= 2
+
+
+@cwd_at('test/extensions')
+def test_call_signatures():
+    # if platform.architecture()[0] == '64bit':
+    package_name = "compiled%s%s" % sys.version_info[:2]
+    sys.path.insert(0, os.getcwd())
+    if os.path.exists(package_name):
+        s = jedi.Script("from %s import compiled; compiled.Foo(" %
+                        package_name)
+        defs = s.call_signatures()
+        for call_def in defs:
+            for param in call_def.params:
+                pass
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