diff --git a/all-spark-notebook/test/test_spark_notebooks.py b/all-spark-notebook/test/test_spark_notebooks.py
index 8debdafc..decb7620 100644
--- a/all-spark-notebook/test/test_spark_notebooks.py
+++ b/all-spark-notebook/test/test_spark_notebooks.py
@@ -32,9 +32,15 @@ def test_nbconvert(container: TrackedContainer, test_file: str) -> None:
     )
     logs = container.run_and_wait(
         timeout=60,
+        no_warnings=False,
         volumes={str(host_data_dir): {"bind": cont_data_dir, "mode": "ro"}},
         tty=True,
         command=["start.sh", "bash", "-c", command],
     )
+    # Spark warning
+    warnings = TrackedContainer.get_warnings(logs)
+    assert len(warnings) == 1
+    assert "An illegal reflective access operation has occurred" in warnings[0]
+
     expected_file = f"{output_dir}/{test_file}.md"
     assert expected_file in logs, f"Expected file {expected_file} not generated"
diff --git a/pyspark-notebook/test/test_spark.py b/pyspark-notebook/test/test_spark.py
index 25e5a550..0d0289e0 100644
--- a/pyspark-notebook/test/test_spark.py
+++ b/pyspark-notebook/test/test_spark.py
@@ -11,9 +11,14 @@ LOGGER = logging.getLogger(__name__)
 def test_spark_shell(container: TrackedContainer) -> None:
     """Checking if Spark (spark-shell) is running properly"""
     logs = container.run_and_wait(
-        no_warnings=False,  # WARNING: An illegal reflective access operation has occurred
         timeout=60,
+        no_warnings=False,
         tty=True,
         command=["start.sh", "bash", "-c", 'spark-shell <<< "1+1"'],
     )
+    # Spark warning
+    warnings = TrackedContainer.get_warnings(logs)
+    assert len(warnings) == 1
+    assert "An illegal reflective access operation has occurred" in warnings[0]
+
     assert "res0: Int = 2" in logs, "spark-shell does not work"