Drop Guardian for 1.11 tests, since we're installing an incompatible version

tests/conftest.py

@@ -67,19 +67,22 @@ def pytest_configure(config):
     )
 
     # guardian is optional
-    try:
+    # Note that for the test cases we're installing a version of django-gaurdian
-        import guardian  # NOQA
+    # that's only compatible with Django 2.0+.
-    except ImportError:
+    if django.VERSION >= (2, 0, 0):
-        pass
+        try:
-    else:
+            import guardian  # NOQA
-        settings.ANONYMOUS_USER_ID = -1
+        except ImportError:
-        settings.AUTHENTICATION_BACKENDS = (
+            pass
-            'django.contrib.auth.backends.ModelBackend',
+        else:
-            'guardian.backends.ObjectPermissionBackend',
+            settings.ANONYMOUS_USER_ID = -1
-        )
+            settings.AUTHENTICATION_BACKENDS = (
-        settings.INSTALLED_APPS += (
+                'django.contrib.auth.backends.ModelBackend',
-            'guardian',
+                'guardian.backends.ObjectPermissionBackend',
-        )
+            )
+            settings.INSTALLED_APPS += (
+                'guardian',
+            )
 
     if config.getoption('--no-pkgroot'):
         sys.path.pop(0)