diff --git a/google/cloud/bigtable/data/_async/client.py b/google/cloud/bigtable/data/_async/client.py
index 310311681..d0578ff1a 100644
--- a/google/cloud/bigtable/data/_async/client.py
+++ b/google/cloud/bigtable/data/_async/client.py
@@ -44,7 +44,6 @@
 )
 from google.cloud.bigtable_v2.types.bigtable import PingAndWarmRequest
 from google.cloud.client import ClientWithProject
-from google.api_core.exceptions import GoogleAPICallError
 from google.cloud.environment_vars import BIGTABLE_EMULATOR  # type: ignore
 from google.api_core import retry as retries
 from google.api_core.exceptions import DeadlineExceeded
diff --git a/google/cloud/bigtable/data/_helpers.py b/google/cloud/bigtable/data/_helpers.py
index 831e468b5..a0b13cbaf 100644
--- a/google/cloud/bigtable/data/_helpers.py
+++ b/google/cloud/bigtable/data/_helpers.py
@@ -98,7 +98,9 @@ def _attempt_timeout_generator(
 
 
 def _retry_exception_factory(
-    exc_list: list[Exception], reason: RetryFailureReason, timeout_val: float | None,
+    exc_list: list[Exception],
+    reason: RetryFailureReason,
+    timeout_val: float | None,
 ) -> tuple[Exception, Exception | None]:
     """
     Build retry error based on exceptions encountered during operation