--- a/tests/run.py
+++ b/tests/run.py
@@ -3,34 +3,38 @@ import os
 import sys
 import unittest
 
-import test_util
-import test_binaryfiles
-import test_diff
-import test_externals
-import test_fetch_branches
-import test_fetch_command
-import test_fetch_command_regexes
-import test_fetch_exec
-import test_fetch_mappings
-import test_fetch_renames
-import test_fetch_symlinks
-import test_fetch_truncated
-import test_pull
-import test_push_command
-import test_push_renames
-import test_push_dirs
-import test_push_eol
-import test_rebuildmeta
-import test_single_dir_clone
-import test_svnwrap
-import test_tags
-import test_utility_commands
-import test_urls
+def tests():
+    import test_util
+    import test_binaryfiles
+    import test_diff
+    import test_externals
+    import test_fetch_branches
+    import test_fetch_command
+    import test_fetch_command_regexes
+    import test_fetch_exec
+    import test_fetch_mappings
+    import test_fetch_renames
+    import test_fetch_symlinks
+    import test_fetch_truncated
+    import test_pull
+    import test_push_command
+    import test_push_renames
+    import test_push_dirs
+    import test_push_eol
+    import test_rebuildmeta
+    import test_single_dir_clone
+    import test_svnwrap
+    import test_tags
+    import test_utility_commands
+    import test_urls
 
-sys.path.append(os.path.join(os.path.dirname(__file__), 'comprehensive'))
+    sys.path.append(os.path.dirname(__file__))
+    sys.path.append(os.path.join(os.path.dirname(__file__), 'comprehensive'))
 
-import test_stupid_pull
-import test_verify
+    import test_stupid_pull
+    import test_verify
+
+    return locals()
 
 def comprehensive(mod):
     dir = os.path.basename(os.path.dirname(mod.__file__))
@@ -58,8 +62,7 @@ if __name__ == '__main__':
     # silence output when running outside nose
     sys.stdout = os.tmpfile()
 
-    all = globals()
-    all = dict((k, v) for (k, v) in all.iteritems() if k.startswith('test_'))
+    all = tests()
     del all['test_util']
 
     args = [i.split('.py')[0].replace('-', '_') for i in args]