diff --git a/python-setuptools.spec b/python-setuptools.spec
index 9fe669b..d3de1dd 100644
--- a/python-setuptools.spec
+++ b/python-setuptools.spec
@@ -126,7 +126,7 @@ donttest="(test_apply_pyproject_equivalent_to_setupcfg and https)"
 # no network access
 donttest+=" or uses_network"
 # test_pbr_integration tries to install pbr from network using pip
-donttest=" test_pbr_integration"
+donttest+=" test_pbr_integration"
 # looks for .exe files that we do not ship
 donttest+=" or test_wheel_includes_cli_scripts"
 # ignores environment variables