diff --git a/pkgs/development/python-modules/pytest-tap/default.nix b/pkgs/development/python-modules/pytest-tap/default.nix
index 8b935c4f91f0..dd545a5b6dd6 100644
--- a/pkgs/development/python-modules/pytest-tap/default.nix
+++ b/pkgs/development/python-modules/pytest-tap/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
     "test_unittest_expected_failure"
   ];
 
-  pythonImportsCheck = 
+  pythonImportsCheck = [
     "pytest_tap"
   ];