diff --git a/products/warehouse_sources/backend/temporal/data_imports/sources/common/rest_source/rest_client.py b/products/warehouse_sources/backend/temporal/data_imports/sources/common/rest_source/rest_client.py
index e5f92e28f622..a93bd7f3dbc3 100644
--- a/products/warehouse_sources/backend/temporal/data_imports/sources/common/rest_source/rest_client.py
+++ b/products/warehouse_sources/backend/temporal/data_imports/sources/common/rest_source/rest_client.py
@@ -30,7 +30,14 @@
 logger = logging.getLogger(__name__)
 
 
-class RESTClientRetryableError(Exception):
+class RESTClientRetryableError(NonReportableError):
+    """A transient failure (429/5xx, connection reset/timeout, malformed/truncated body) that
+    tenacity reissues up to the client's attempt cap. Once that budget is exhausted it escapes to
+    the activity and Temporal's own activity retry takes over — the upstream blip is expected to
+    clear, not a PostHog defect. Subclasses NonReportableError, like ``RESTClientNonRetryableError``,
+    so the activity interceptor keeps it out of error tracking instead of minting an issue per blip.
+    """
+
     def __init__(self, message: str, retry_after: Optional[float] = None) -> None:
         super().__init__(message)
         self.retry_after = retry_after
diff --git a/products/warehouse_sources/backend/temporal/data_imports/sources/common/rest_source/tests/test_rest_client.py b/products/warehouse_sources/backend/temporal/data_imports/sources/common/rest_source/tests/test_rest_client.py
index 4b1126306711..b75c81e62014 100644
--- a/products/warehouse_sources/backend/temporal/data_imports/sources/common/rest_source/tests/test_rest_client.py
+++ b/products/warehouse_sources/backend/temporal/data_imports/sources/common/rest_source/tests/test_rest_client.py
@@ -353,10 +353,14 @@ def test_send_request_raises_retryable_after_persistent_transient_error(
         mock_session.send.return_value = error
 
         client = RESTClient(base_url="https://api.example.com")
-        with pytest.raises(RESTClientRetryableError):
+        with pytest.raises(RESTClientRetryableError) as ctx:
             list(client.paginate(path="/items", paginator=SinglePagePaginator()))
 
         assert mock_session.send.call_count == 5
+        # An upstream blip surviving every tenacity attempt is expected to clear on Temporal's own
+        # activity retry, not a PostHog defect, so it must carry the non-reportable marker the
+        # activity interceptor uses to keep it out of error tracking.
+        assert isinstance(ctx.value, NonReportableError)
 
     @pytest.mark.parametrize(
         "content",