diff --git a/test/test_atoms.py b/test/test_atoms.py
index 498e926..ec7821f 100644
--- a/test/test_atoms.py
+++ b/test/test_atoms.py
@@ -2,6 +2,7 @@ from mdevaluate import atoms
 
 
 def test_compare_regex():
-    assert atoms.compare_regex(['OW', ], 'O')[0] == False
-    assert atoms.compare_regex(['WO', ], 'O')[0] == False
-    assert atoms.compare_regex(['O', ], 'O')[0] == True
+    assert atoms.compare_regex(['OW', ], 'O')[0]
+    assert not atoms.compare_regex(['OW', ], 'O$')[0]
+    assert not atoms.compare_regex(['WO', ], 'O')[0]
+    assert atoms.compare_regex(['O', ], 'O')[0]