diff --git a/tests/test_utils.py b/tests/test_utils.py
index f6ab1e6..82c7d59 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -16,6 +16,7 @@ def __init__(self, name):
 class FakeFrame:
     def __init__(self, name):
         self.f_code = FakeCode(name)
+        self.f_lineno = 1
 
 
 class TestUtils(TestBase):
@@ -23,7 +24,7 @@ def test_get_dump_filename(self):
         frame = FakeFrame("test_get_dump_filename")
         filename = get_dump_filename(frame, None, None)
         self.assertEqual(filename, os.path.abspath(filename))
-        self.assertIn("test_get_dump_filename", filename)
+        self.assertIn("test_get_dump_filename_1", filename)
 
         filename = get_dump_filename(frame, "test.dump", None)
         self.assertEqual(filename, os.path.abspath("test.dump"))
@@ -33,7 +34,7 @@ def test_get_dump_filename(self):
 
         filename = get_dump_filename(frame, None, "dir")
         self.assertEqual(filename, os.path.abspath(filename))
-        self.assertIn("test_get_dump_filename", filename)
+        self.assertIn("test_get_dump_filename_1", filename)
         self.assertIn("dir", filename)
 
         with self.assertRaises(ValueError):