diff --git a/src/databricks/labs/pytester/fixtures/compute.py b/src/databricks/labs/pytester/fixtures/compute.py
index cfefc31..90988ad 100644
--- a/src/databricks/labs/pytester/fixtures/compute.py
+++ b/src/databricks/labs/pytester/fixtures/compute.py
@@ -104,7 +104,7 @@ def create(
                 }
             else:
                 kwargs["spark_conf"] = {"spark.databricks.cluster.profile": "singleNode", "spark.master": "local[*]"}
-            kwargs["custom_tags"] = {"ResourceClass": "SingleNode"}
+            kwargs["custom_tags"] = kwargs.get("custom_tags", {}) | {"ResourceClass": "SingleNode"}
         if "instance_pool_id" not in kwargs:
             kwargs["node_type_id"] = ws.clusters.select_node_type(local_disk=True, min_memory_gb=16)
         if "custom_tags" not in kwargs:
diff --git a/tests/integration/fixtures/test_compute.py b/tests/integration/fixtures/test_compute.py
index d7ca52a..2967333 100644
--- a/tests/integration/fixtures/test_compute.py
+++ b/tests/integration/fixtures/test_compute.py
@@ -18,6 +18,17 @@ def test_cluster(make_cluster, env_or_skip):
     logger.info(f"created {make_cluster(single_node=True, instance_pool_id=env_or_skip('TEST_INSTANCE_POOL_ID'))}")
 
 
+def test_cluster_custom_tags(make_cluster, env_or_skip):
+    cluster = make_cluster(
+        single_node=True,
+        instance_pool_id=env_or_skip('TEST_INSTANCE_POOL_ID'),
+        tags=[EndpointTagPair(key='my-custom-tag', value='my-custom-tag-value')],
+    )
+    cluster_tags = cluster.tags.as_dict()
+    assert isinstance(cluster_tags, dict)
+    assert cluster_tags["custom_tags"][1]["key"] == "my-custom-tag"
+
+
 def test_instance_pool(make_instance_pool):
     logger.info(f"created {make_instance_pool()}")