diff --git a/CHANGELOG.md b/CHANGELOG.md
index 987bc79c6..528cd08b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,9 @@
-## dbt-bigquery 1.1.0 (TBD)
+## dbt-bigquery 1.1.0 (Release TBD)
+
+### Fixes
+- Restore default behavior for query timeout. Set default `job_execution_timeout` to `None` by default. Keep 300 seconds as query timeout where previously used.
+
+## dbt-bigquery 1.1.0rc1 (April 13, 2022)
 
 ### Under the hood
 - Use dbt.tests.adapter.basic in tests (new test framework) ([#135](https://github.com/dbt-labs/dbt-bigquery/issues/135), [#142](https://github.com/dbt-labs/dbt-bigquery/pull/142))
diff --git a/dbt/adapters/bigquery/connections.py b/dbt/adapters/bigquery/connections.py
index 05f236a55..5a5b83044 100644
--- a/dbt/adapters/bigquery/connections.py
+++ b/dbt/adapters/bigquery/connections.py
@@ -103,7 +103,7 @@ class BigQueryCredentials(Credentials):
     job_retry_deadline_seconds: Optional[int] = None
     job_retries: Optional[int] = 1
     job_creation_timeout_seconds: Optional[int] = None
-    job_execution_timeout_seconds: Optional[int] = 300
+    job_execution_timeout_seconds: Optional[int] = None
 
     # Keyfile json creds
     keyfile: Optional[str] = None
@@ -301,7 +301,7 @@ def get_impersonated_bigquery_credentials(cls, profile_credentials):
             source_credentials=source_credentials,
             target_principal=profile_credentials.impersonate_service_account,
             target_scopes=list(profile_credentials.scopes),
-            lifetime=profile_credentials.job_execution_timeout_seconds,
+            lifetime=(profile_credentials.job_execution_timeout_seconds or 300),
         )
 
     @classmethod
@@ -524,7 +524,8 @@ def copy_bq_table(self, source, destination, write_disposition):
         def copy_and_results():
             job_config = google.cloud.bigquery.CopyJobConfig(write_disposition=write_disposition)
             copy_job = client.copy_table(source_ref_array, destination_ref, job_config=job_config)
-            iterator = copy_job.result(timeout=self.get_job_execution_timeout_seconds(conn))
+            timeout = self.get_job_execution_timeout_seconds(conn) or 300
+            iterator = copy_job.result(timeout=timeout)
             return copy_job, iterator
 
         self._retry_and_handle(
diff --git a/dbt/adapters/bigquery/impl.py b/dbt/adapters/bigquery/impl.py
index 0fc5fc1cc..50ca3c6e1 100644
--- a/dbt/adapters/bigquery/impl.py
+++ b/dbt/adapters/bigquery/impl.py
@@ -624,7 +624,7 @@ def load_dataframe(self, database, schema, table_name, agate_table, column_overr
         with open(agate_table.original_abspath, "rb") as f:
             job = client.load_table_from_file(f, table_ref, rewind=True, job_config=load_config)
 
-        timeout = self.connections.get_job_execution_timeout_seconds(conn)
+        timeout = self.connections.get_job_execution_timeout_seconds(conn) or 300
         with self.connections.exception_handler("LOAD TABLE"):
             self.poll_until_job_completes(job, timeout)
 
@@ -647,7 +647,7 @@ def upload_file(
         with open(local_file_path, "rb") as f:
             job = client.load_table_from_file(f, table_ref, rewind=True, job_config=load_config)
 
-        timeout = self.connections.get_job_execution_timeout_seconds(conn)
+        timeout = self.connections.get_job_execution_timeout_seconds(conn) or 300
         with self.connections.exception_handler("LOAD TABLE"):
             self.poll_until_job_completes(job, timeout)