diff --git a/neo4j/io/_bolt3.py b/neo4j/io/_bolt3.py
index ad90a6529..06ac3328c 100644
--- a/neo4j/io/_bolt3.py
+++ b/neo4j/io/_bolt3.py
@@ -45,9 +45,9 @@
     SessionExpired,
 )
 from neo4j.io import (
-    check_supported_server_product,
     Bolt,
     BoltPool,
+    check_supported_server_product,
 )
 from neo4j.io._common import (
     CommitResponse,
@@ -62,6 +62,7 @@
     Unpacker,
 )
 
+
 log = getLogger("neo4j")
 
 
diff --git a/neo4j/io/_bolt4.py b/neo4j/io/_bolt4.py
index ee4c91374..3051f499a 100644
--- a/neo4j/io/_bolt4.py
+++ b/neo4j/io/_bolt4.py
@@ -62,6 +62,7 @@
     Packer,
 )
 
+
 log = getLogger("neo4j")
 
 
diff --git a/neo4j/work/result.py b/neo4j/work/result.py
index 19d768b42..6e8a097e5 100644
--- a/neo4j/work/result.py
+++ b/neo4j/work/result.py
@@ -47,7 +47,6 @@ def __init__(self, connection, on_network_error):
             connection raises of of the caught errors. The callback takes the
             error as argument.
         :type on_network_error callable
-
         """
         self._connection = connection
         self._on_network_error = on_network_error
diff --git a/testkitbackend/backend.py b/testkitbackend/backend.py
index 0a406a4ad..fb73af1aa 100644
--- a/testkitbackend/backend.py
+++ b/testkitbackend/backend.py
@@ -152,10 +152,10 @@ def _process(self, request):
             if isinstance(e, Neo4jError):
                 payload["code"] = e.code
             self.send_response("DriverError", payload)
-        except Exception as e:
-            traceback.print_exception(type(e), e, e.__traceback__)
-            self.send_response("BackendError",
-                               {"msg": "%s: %s" % (type(e), e)})
+        except Exception:
+            tb = traceback.format_exc()
+            log.error(tb)
+            self.send_response("BackendError", {"msg": tb})
 
     def send_response(self, name, data):
         """ Sends a response to backend.
diff --git a/testkitbackend/skipped_tests.json b/testkitbackend/skipped_tests.json
index 0967ef424..4adc212fa 100644
--- a/testkitbackend/skipped_tests.json
+++ b/testkitbackend/skipped_tests.json
@@ -1 +1,68 @@
-{}
+{
+  "stub.retry.TestRetryClustering.test_retry_ForbiddenOnReadOnlyDatabase_ChangingWriter":
+    "Closes connection to router after ROUTE",
+  "stub.routing.Routing.test_should_use_resolver_during_rediscovery_when_existing_routers_fail":
+    "DNS resolver not implemented",
+  "stub.routing.RoutingV3.test_should_use_resolver_during_rediscovery_when_existing_routers_fail":
+    "DNS resolver not implemented",
+  "stub.routing.RoutingV4.test_should_use_resolver_during_rediscovery_when_existing_routers_fail":
+    "DNS resolver not implemented",
+  "stub.routing.NoRouting.test_should_use_resolver_during_rediscovery_when_existing_routers_fail":
+    "DNS resolver not implemented",
+  "stub.routing.Routing.test_should_request_rt_from_all_initial_routers_until_successful":
+    "DNS resolver not implemented",
+  "stub.routing.RoutingV3.test_should_request_rt_from_all_initial_routers_until_successful":
+    "DNS resolver not implemented",
+  "stub.routing.RoutingV4.test_should_request_rt_from_all_initial_routers_until_successful":
+    "DNS resolver not implemented",
+  "stub.routing.NoRouting.test_should_request_rt_from_all_initial_routers_until_successful":
+    "DNS resolver not implemented",
+  "stub.routing.Routing.test_should_successfully_acquire_rt_when_router_ip_changes":
+    "DNS resolver not implemented",
+  "stub.routing.RoutingV3.test_should_successfully_acquire_rt_when_router_ip_changes":
+    "DNS resolver not implemented",
+  "stub.routing.RoutingV4.test_should_successfully_acquire_rt_when_router_ip_changes":
+    "DNS resolver not implemented",
+  "stub.routing.NoRouting.test_should_successfully_acquire_rt_when_router_ip_changes":
+    "DNS resolver not implemented",
+  "stub.routing.Routing.test_should_read_successfully_on_empty_discovery_result_using_session_run":
+    "Driver iterates over results of custom resolver and settles on first connection yielding a successful handshake",
+  "stub.routing.RoutingV3.test_should_read_successfully_on_empty_discovery_result_using_session_run":
+    "Driver iterates over results of custom resolver and settles on first connection yielding a successful handshake",
+  "stub.routing.RoutingV4.test_should_read_successfully_on_empty_discovery_result_using_session_run":
+    "Driver iterates over results of custom resolver and settles on first connection yielding a successful handshake",
+  "stub.routing.NoRouting.test_should_read_successfully_on_empty_discovery_result_using_session_run":
+    "Driver iterates over results of custom resolver and settles on first connection yielding a successful handshake",
+  "stub.routing.Routing.test_should_retry_read_tx_and_rediscovery_until_success":
+    "Driver iterates over results of custom resolver and settles on first connection yielding a successful handshake",
+  "stub.routing.RoutingV3.test_should_retry_read_tx_and_rediscovery_until_success":
+    "Driver iterates over results of custom resolver and settles on first connection yielding a successful handshake",
+  "stub.routing.RoutingV4.test_should_retry_read_tx_and_rediscovery_until_success":
+    "Driver iterates over results of custom resolver and settles on first connection yielding a successful handshake",
+  "stub.routing.NoRouting.test_should_retry_read_tx_and_rediscovery_until_success":
+    "Driver iterates over results of custom resolver and settles on first connection yielding a successful handshake",
+  "stub.routing.Routing.test_should_retry_write_until_success_with_leader_change_using_tx_function":
+    "Driver opens a new connection each time to get a fresh routing table",
+  "stub.routing.RoutingV3.test_should_retry_write_until_success_with_leader_change_using_tx_function":
+    "Driver opens a new connection each time to get a fresh routing table",
+  "stub.routing.RoutingV4.test_should_retry_write_until_success_with_leader_change_using_tx_function":
+    "Driver opens a new connection each time to get a fresh routing table",
+  "stub.routing.NoRouting.test_should_retry_write_until_success_with_leader_change_using_tx_function":
+    "Driver opens a new connection each time to get a fresh routing table",
+  "stub.routing.Routing.test_should_retry_write_until_success_with_leader_shutdown_during_tx_using_tx_function":
+    "Driver opens a new connection each time to get a fresh routing table",
+  "stub.routing.RoutingV3.test_should_retry_write_until_success_with_leader_shutdown_during_tx_using_tx_function":
+    "Driver opens a new connection each time to get a fresh routing table",
+  "stub.routing.RoutingV4.test_should_retry_write_until_success_with_leader_shutdown_during_tx_using_tx_function":
+    "Driver opens a new connection each time to get a fresh routing table",
+  "stub.routing.NoRouting.test_should_retry_write_until_success_with_leader_shutdown_during_tx_using_tx_function":
+    "Driver opens a new connection each time to get a fresh routing table",
+  "stub.routing.Routing.test_should_revert_to_initial_router_if_known_router_throws_protocol_errors":
+    "Driver uses custom resolver for each connection, not only initial seeding",
+  "stub.routing.RoutingV3.test_should_revert_to_initial_router_if_known_router_throws_protocol_errors":
+    "Driver uses custom resolver for each connection, not only initial seeding",
+  "stub.routing.RoutingV4.test_should_revert_to_initial_router_if_known_router_throws_protocol_errors":
+    "Driver uses custom resolver for each connection, not only initial seeding",
+  "stub.routing.NoRouting.test_should_revert_to_initial_router_if_known_router_throws_protocol_errors":
+    "Driver uses custom resolver for each connection, not only initial seeding"
+}