diff --git a/kallithea/controllers/api/api.py b/kallithea/controllers/api/api.py
--- a/kallithea/controllers/api/api.py
+++ b/kallithea/controllers/api/api.py
@@ -1675,9 +1675,10 @@ class ApiController(JSONRPCController):
         try:
             # create structure of groups and return the last group
             group = map_groups(fork_name)
+            fork_base_name = fork_name.rsplit('/', 1)[-1]
 
             form_data = dict(
-                repo_name=fork_name,
+                repo_name=fork_base_name,
                 repo_name_full=fork_name,
                 repo_group=group,
                 repo_type=repo.repo_type,
diff --git a/kallithea/tests/api/api_base.py b/kallithea/tests/api/api_base.py
--- a/kallithea/tests/api/api_base.py
+++ b/kallithea/tests/api/api_base.py
@@ -1391,8 +1391,11 @@ class _BaseTestApi(object):
         self._compare_ok(id_, expected, given=response.body)
         fixture.destroy_repo(fork_name)
 
-    def test_api_fork_repo_non_admin(self):
-        fork_name = 'api-repo-fork'
+    @parameterized.expand([
+        (u'api-repo-fork',),
+        (u'%s/api-repo-fork' % TEST_REPO_GROUP,),
+    ])
+    def test_api_fork_repo_non_admin(self, fork_name):
         id_, params = _build_data(self.apikey_regular, 'fork_repo',
                                   repoid=self.REPO,
                                   fork_name=fork_name,