diff --git a/test/test_functest.py b/test/test_functest.py
index d4517947..0768afdd 100644
--- a/test/test_functest.py
+++ b/test/test_functest.py
@@ -14,14 +14,14 @@ import helpers
 def test_functest():
     for scheme in pqclean.Scheme.all_schemes():
         for implementation in scheme.implementations:
-            if helpers.permit_test('functest', implementation): 
+            if helpers.permit_test('functest', implementation):
                 yield check_functest, implementation
 
 
 def test_functest_sanitizers():
     for scheme in pqclean.Scheme.all_schemes():
         for implementation in scheme.implementations:
-            if helpers.permit_test('functest_sanitizers', implementation): 
+            if helpers.permit_test('functest_sanitizers', implementation):
                 yield check_functest_sanitizers, implementation
 
 
@@ -41,7 +41,7 @@ def check_functest(implementation):
     )
 
 
-@helpers.skip_windows
+@helpers.skip_windows()
 def check_functest_sanitizers(implementation):
     env = None
     if platform.machine() == 'ppc' and os.environ.get('CC', 'gcc') == 'clang':