diff --git a/gslib/tests/test_shim_util.py b/gslib/tests/test_shim_util.py
index 70a02d0b0..3d39bfaa1 100644
--- a/gslib/tests/test_shim_util.py
+++ b/gslib/tests/test_shim_util.py
@@ -1251,7 +1251,7 @@ def test_gcs_json_endpoint_translation(self):
       self.assertEqual(
           env_vars, {
               'CLOUDSDK_API_ENDPOINT_OVERRIDES_STORAGE':
-                  'https://foo_host:1234/storage/v2',
+                  'https://foo_host:1234/storage/v2/',
           })
 
   def test_gcs_json_endpoint_translation_with_missing_port(self):
@@ -1265,7 +1265,7 @@ def test_gcs_json_endpoint_translation_with_missing_port(self):
       self.assertEqual(flags, [])
       self.assertEqual(env_vars, {
           'CLOUDSDK_API_ENDPOINT_OVERRIDES_STORAGE':
-              'https://foo_host/storage/v2',
+              'https://foo_host/storage/v2/',
       })
 
   def test_gcs_json_endpoint_translation_usees_default_version_v1(self):
@@ -1279,7 +1279,7 @@ def test_gcs_json_endpoint_translation_usees_default_version_v1(self):
       self.assertEqual(
           env_vars, {
               'CLOUDSDK_API_ENDPOINT_OVERRIDES_STORAGE':
-                  'https://foo_host:1234/storage/v1'
+                  'https://foo_host:1234/storage/v1/'
           })
 
   def test_s3_endpoint_translation(self):
diff --git a/gslib/utils/shim_util.py b/gslib/utils/shim_util.py
index c8b3c77db..aaad290ea 100644
--- a/gslib/utils/shim_util.py
+++ b/gslib/utils/shim_util.py
@@ -275,7 +275,7 @@ def _get_gcs_json_endpoint_from_boto_config(config):
     gs_json_port = config.get('Credentials', 'gs_json_port')
     port = ':' + gs_json_port if gs_json_port else ''
     json_api_version = config.get('Credentials', 'json_api_version', 'v1')
-    return 'https://{}{}/storage/{}'.format(gs_json_host, port,
+    return 'https://{}{}/storage/{}/'.format(gs_json_host, port,
                                             json_api_version)
   return None