diff --git a/.test-infra/tools/stale_cleaner.py b/.test-infra/tools/stale_cleaner.py
index 2c702cfa0fd8..a00bb3ad7ab5 100644
--- a/.test-infra/tools/stale_cleaner.py
+++ b/.test-infra/tools/stale_cleaner.py
@@ -336,10 +336,13 @@ def _active_resources(self) -> dict:
             for subscription in self.client.list_subscriptions(request={"project": self.project_path}):
                 subscription_name = subscription.name
                 # Apply prefix filtering if prefixes are defined
-                if not self.prefixes or any(subscription_name.startswith(f"{self.project_path}/subscriptions/{prefix}") for prefix in self.prefixes):
-                    # Check if the subscription has a topic associated with it
-                    if subscription.detached:
+                if subscription.detached:
                         d[subscription_name] = GoogleCloudResource(resource_name=subscription_name, clock=self.clock)
+                #Only attached subscriptions with the NYC taxi prefix are eligible.
+                elif any(
+                    subscription_name.startswith(f"{self.project_path}/subscriptions/{prefix}") for prefix in self.prefixes
+                ):
+                    d[subscription_name] = GoogleCloudResource(resource_name=subscription_name, clock=self.clock)
 
         return d
 
@@ -416,8 +419,10 @@ def clean_pubsub_subscriptions():
     project_id = DEFAULT_PROJECT_ID
     bucket_name = DEFAULT_BUCKET_NAME
 
-    # No prefixes are defined for subscriptions so we will delete all stale subscriptions
-    prefixes = []
+    # Restrict subscription cleanup to the NYC taxi prefix only.
+    prefixes = [
+        "taxirides-realtime_beam_",
+    ]
 
     # Create a PubSubSubscriptionCleaner instance
     cleaner = PubSubSubscriptionCleaner(project_id=project_id, bucket_name=bucket_name,
diff --git a/.test-infra/tools/test_stale_cleaner.py b/.test-infra/tools/test_stale_cleaner.py
index c53fbc1a44db..08cdab39b85f 100644
--- a/.test-infra/tools/test_stale_cleaner.py
+++ b/.test-infra/tools/test_stale_cleaner.py
@@ -431,30 +431,57 @@ def test_init(self):
         self.assertEqual(self.cleaner.time_threshold, self.time_threshold)
         self.assertIsInstance(self.cleaner.clock, FakeClock)
 
-    def test_active_resources(self):
-        """Test _active_resources method."""
-        # Mock subscriptions
-        sub1 = mock.Mock()
-        sub1.name = "projects/test-project/subscriptions/test-prefix-sub1"
-        sub1.topic = "projects/test-project/topics/some-topic"
+    def test_active_resources_active_subscriptions(self):
+        """Verify that active subscriptions with the 'taxirides' prefix are identified."""
+        self.cleaner.prefixes = ["taxirides-realtime_beam_"]
 
-        sub2 = mock.Mock()
-        sub2.name = "projects/test-project/subscriptions/test-prefix-sub2-detached"
-        sub2.topic = "_deleted-topic_"
+        # Active suscription with the correct taxi prefix
+        sub_taxi_active = mock.Mock()
+        sub_taxi_active.name = f"projects/{self.project_id}/subscriptions/taxirides-realtime_beam_-12345"
+        sub_taxi_active.topic = "projects/pubsub-public-data/topics/taxirides-realtime"
+        sub_taxi_active.detached = False
 
-        sub3 = mock.Mock()
-        sub3.name = "projects/test-project/subscriptions/other-prefix-sub3"
-        sub3.topic = "projects/test-project/topics/another-topic"
+        # Active subscription with a different prefix
+        sub_other_active = mock.Mock()
+        sub_other_active.name = f"projects/{self.project_id}/subscriptions/other-prefix-sub"
+        sub_other_active.topic = f"projects/{self.project_id}/topics/another-topic"
+        sub_other_active.detached = False
 
-        self.mock_subscriber_client.list_subscriptions.return_value = [sub1, sub2, sub3]
+        self.mock_subscriber_client.list_subscriptions.return_value = [sub_taxi_active, sub_other_active]
 
         with SilencePrint():
             active = self.cleaner._active_resources()
 
-        self.assertIn("projects/test-project/subscriptions/test-prefix-sub1", active)
-        self.assertIn("projects/test-project/subscriptions/test-prefix-sub2-detached", active)
-        self.assertNotIn("projects/test-project/subscriptions/other-prefix-sub3", active)
-        self.assertEqual(len(active), 2)
+        # Verify that only the taxi subscription is captured, discarding the other one
+        self.assertIn(sub_taxi_active.name, active)
+        self.assertNotIn(sub_other_active.name, active)
+        self.assertEqual(len(active), 1)
+
+    def test_active_resources_detached_subscriptions(self):
+            """Verify that detached subscriptions with the 'test-prefix' prefix are identified."""
+            self.cleaner.prefixes = ["test-prefix"]
+
+            # Standar suscription with a detached topic (should be included)
+            sub_detached = mock.Mock()
+            sub_detached.name = f"projects/{self.project_id}/subscriptions/test-prefix-detached"
+            sub_detached.topic = "_deleted-topic_"
+            sub_detached.detached = True
+
+            # Standard connected subscription (should ignore)
+            sub_attached = mock.Mock()
+            sub_attached.name = f"projects/{self.project_id}/subscriptions/other-prefix-attached"
+            sub_attached.topic = f"projects/{self.project_id}/topics/some-topic"
+            sub_attached.detached = False
+
+            self.mock_subscriber_client.list_subscriptions.return_value = [sub_detached, sub_attached]
+
+            with SilencePrint():
+                active = self.cleaner._active_resources()
+
+            # Only the detached subscription should be included in the active resources
+            self.assertIn(sub_detached.name, active)
+            self.assertNotIn(sub_attached.name, active)
+            self.assertEqual(len(active), 1)
 
     def test_delete_resource(self):
         """Test _delete_resource method."""