diff --git a/tests/lib/__init__.py b/tests/lib/__init__.py
index 0cfd56956fb..a253b40ed1e 100644
--- a/tests/lib/__init__.py
+++ b/tests/lib/__init__.py
@@ -302,14 +302,16 @@ def assert_installed(self, pkg_name, editable=True, with_files=[],
                 sorted(self.files_created.keys())))
 
         for f in with_files:
-            if not (pkg_dir / f).normpath in self.files_created:
+            normalized_path = os.path.normpath(pkg_dir / f)
+            if normalized_path not in self.files_created:
                 raise TestFailure(
                     'Package directory %r missing expected content %r' %
                     (pkg_dir, f)
                 )
 
         for f in without_files:
-            if (pkg_dir / f).normpath in self.files_created:
+            normalized_path = os.path.normpath(pkg_dir / f)
+            if normalized_path in self.files_created:
                 raise TestFailure(
                     'Package directory %r has unexpected content %f' %
                     (pkg_dir, f)
@@ -424,7 +426,9 @@ def __init__(self, base_path, *args, **kwargs):
         )
         if sys.platform == 'win32':
             if sys.version_info >= (3, 5):
-                scripts_base = self.user_site_path.joinpath('..').normpath
+                scripts_base = Path(
+                    os.path.normpath(self.user_site_path.joinpath('..'))
+                )
             else:
                 scripts_base = self.user_base_path
             self.user_bin_path = scripts_base.joinpath('Scripts')
diff --git a/tests/lib/path.py b/tests/lib/path.py
index 18e9d744ebe..25785a62ba4 100644
--- a/tests/lib/path.py
+++ b/tests/lib/path.py
@@ -137,13 +137,6 @@ def resolve(self):
         """
         return Path(os.path.realpath(self))
 
-    @property
-    def normpath(self):
-        """
-        '/home/x/.././a//bc.d' -> '/home/a/bc.d'
-        """
-        return Path(os.path.normpath(self))
-
     @property
     def parent(self):
         """