diff --git a/Pipfile b/Pipfile
index 82f0c0b8b..cda804f9e 100644
--- a/Pipfile
+++ b/Pipfile
@@ -10,7 +10,7 @@ mock = "*"
 pylama = "*"
 pytest = "*"
 pytest-cov = "*"
-responses = "*"
+responses = "==0.6.0"
 sphinx-autobuild = "*"
 testfixtures = "*"
 tox = "*"
diff --git a/Pipfile.lock b/Pipfile.lock
index 97adacc43..e0acfc898 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "95e627ebcb0f7571bdbb665476845afd36d03e678d5b96b3f1659d163b720062"
+            "sha256": "cb251e7bb5b632a55271838b603f7863c69d8314771aae0d94bff58bce6c3867"
         },
         "requires": {},
         "sources": [
@@ -175,7 +175,7 @@
             "version": "==2.18.3"
         },
         "responses": {
-            "version": "==0.6.1"
+            "version": "==0.6.0"
         },
         "setuptools": {
             "version": "==36.2.7"
diff --git a/tests/test_oic_provider.py b/tests/test_oic_provider.py
index 739b62c07..3c571f9b1 100644
--- a/tests/test_oic_provider.py
+++ b/tests/test_oic_provider.py
@@ -831,7 +831,6 @@ def test_verify_sector_identifier_nonreachable(self):
 
         assert len(logcap.records) == 0
 
-    @pytest.mark.skip(reason='https://github.com/OpenIDC/pyoidc/issues/402')
     def test_verify_sector_identifier_error(self):
         rr = RegistrationRequest(operation="register", sector_identifier_uri="https://example.com")
         error = ConnectionError('broken connection')