diff --git a/tests/test_platform.py b/tests/test_platform.py
index 6dcbfaeeab8a7f7a1ad04732f6ac810bd30992d0..05321fb43bf9578fd1e59714d118f335bb6f1640 100644
--- a/tests/test_platform.py
+++ b/tests/test_platform.py
@@ -7,6 +7,7 @@
 
 
 import            os
+import            gc
 import os.path as op
 import            sys
 import            shutil
@@ -67,6 +68,8 @@ def test_haveGui():
 @pytest.mark.wxtest
 def test_wxatts():
 
+    gc.collect()
+
     with mock.patch.dict('sys.modules', wx=None):
         p = fslplatform.Platform()
         assert not p.canHaveGui