diff --git a/appveyor.yml b/appveyor.yml
index 39ee1f5cf..c0335d406 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -26,7 +26,7 @@ build_script:
 test_script:
 - cd c:\pillow
 - '%PYTHON%\Scripts\pip.exe install nose'
-- '%PYTHON%\python.exe test-installed.py'
+- '%PYTHON%\python.exe test-installed.py -v -s'
 matrix:
   fast_finish: true
 artifacts:
diff --git a/test-installed.py b/test-installed.py
index 9beef27aa..c5aff1360 100755
--- a/test-installed.py
+++ b/test-installed.py
@@ -13,7 +13,10 @@ sys.path.insert(0, os.path.abspath('./Tests'))
 # if there's no test selected (mostly) choose a working default.
 # Something is required, because if we import the tests from the local
 # directory, once again, we've got the non-installed PIL in the way
-if len(sys.argv) == 1:
+for arg in sys.argv[1:]:
+    if '.py' in arg:
+        break
+else:
     sys.argv.extend(glob.glob('Tests/test*.py'))
 
 # Make sure that nose doesn't muck with our paths.