diff --git a/metadata-ingestion/setup.py b/metadata-ingestion/setup.py
index 0dc261fa14..1195cd24a7 100644
--- a/metadata-ingestion/setup.py
+++ b/metadata-ingestion/setup.py
@@ -25,7 +25,8 @@ base_requirements = {
     # Actual dependencies.
     "typing-inspect",
     # pydantic 1.10.3 is incompatible with typing-extensions 4.1.1 - https://github.com/pydantic/pydantic/issues/4885
-    "pydantic>=1.5.1,!=1.10.3",
+    # pydantic 2 makes major, backwards-incompatible changes - https://github.com/pydantic/pydantic/issues/4887
+    "pydantic>=1.5.1,!=1.10.3,<2",
     "mixpanel>=4.9.0",
 }
 
diff --git a/metadata-ingestion/src/datahub/cli/ingest_cli.py b/metadata-ingestion/src/datahub/cli/ingest_cli.py
index 077072c982..2cb8bd87cb 100644
--- a/metadata-ingestion/src/datahub/cli/ingest_cli.py
+++ b/metadata-ingestion/src/datahub/cli/ingest_cli.py
@@ -199,6 +199,7 @@ def run(
 
 
 def _test_source_connection(report_to: Optional[str], pipeline_config: dict) -> None:
+    connection_report = None
     try:
         connection_report = ConnectionManager().test_source_connection(pipeline_config)
         logger.info(connection_report.as_json())
diff --git a/metadata-ingestion/src/datahub/ingestion/source/looker/looker_lib_wrapper.py b/metadata-ingestion/src/datahub/ingestion/source/looker/looker_lib_wrapper.py
index 8e39d2d9f4..e51c824a57 100644
--- a/metadata-ingestion/src/datahub/ingestion/source/looker/looker_lib_wrapper.py
+++ b/metadata-ingestion/src/datahub/ingestion/source/looker/looker_lib_wrapper.py
@@ -14,6 +14,7 @@ from looker_sdk.sdk.api40.models import (
     DBConnection,
     Folder,
     LookmlModel,
+    LookmlModelExplore,
     User,
     WriteQuery,
 )
@@ -145,7 +146,7 @@ class LookerAPI:
             transport_options=self.transport_options,
         )
 
-    def lookml_model_explore(self, model, explore_name):
+    def lookml_model_explore(self, model: str, explore_name: str) -> LookmlModelExplore:
         self.client_stats.explore_calls += 1
         return self.client.lookml_model_explore(
             model, explore_name, transport_options=self.transport_options