diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7ada82c3d0..14dee61473 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -42,7 +42,9 @@ jobs:
       - checkout
       - run:
           name: Verify that BigQuery validates each query
-          command: script/dryrun
+          command: |
+            pip install PyYaml
+            script/dryrun
   deploy:
     parameters:
       image:
diff --git a/bigquery_etl/parse_metadata.py b/bigquery_etl/parse_metadata.py
index 743af4aed8..711072afc3 100644
--- a/bigquery_etl/parse_metadata.py
+++ b/bigquery_etl/parse_metadata.py
@@ -76,7 +76,7 @@ class Metadata:
 
     @classmethod
     def of_sql_file(cls, sql_file):
-        """Returns the metadata that is associated with the provided SQL file."""
+        """Return the metadata that is associated with the provided SQL file."""
         path, _ = os.path.split(sql_file)
         metadata_file = os.path.join(path, METADATA_FILE)
         cls = Metadata.from_file(metadata_file)
diff --git a/script/dryrun b/script/dryrun
index 75ec973874..b8710dd902 100755
--- a/script/dryrun
+++ b/script/dryrun
@@ -97,8 +97,6 @@ USE_DERIVED_DATASETS = {
 }
 
 
-
-
 def worker_entrypoint(public_project, sqlfile):
     sql = open(sqlfile).read()
     if sqlfile in USE_DERIVED_DATASETS:
@@ -114,7 +112,7 @@ def worker_entrypoint(public_project, sqlfile):
             metadata = Metadata.of_sql_file(sqlfile)
             if metadata.is_public_bigquery():
                 request_data["project"] = public_project
-        except Exception as e:
+        except Exception:
             # for all other queries perform dryrun in default project
             pass
 
diff --git a/script/publish_public_data_views b/script/publish_public_data_views
index 8c8ac79eb7..85ced475d3 100755
--- a/script/publish_public_data_views
+++ b/script/publish_public_data_views
@@ -46,7 +46,7 @@ parser.add_argument(
 
 def is_public_bigquery(metadata_file):
     """
-    Reads the metadata file associated with the query to determine if the query 
+    Reads the metadata file associated with the query to determine if the query
     results should be written into the public dataset.
     """
 
@@ -69,7 +69,7 @@ def generate_and_publish_view(client, project, dataset, table, public_project, d
     full_view_id = ".".join([project, dataset, table])
     public_table = ".".join([public_project, dataset, table])
 
-    view_sql = f"""CREATE OR REPLACE VIEW 
+    view_sql = f"""CREATE OR REPLACE VIEW
         `{full_view_id}`
     AS SELECT * FROM `{public_table}`
     """