diff --git a/tests/parallel_test/cases.task b/tests/parallel_test/cases.task
index f0543f2456..6cf033f5f8 100644
--- a/tests/parallel_test/cases.task
+++ b/tests/parallel_test/cases.task
@@ -367,7 +367,7 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/stablity_1.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/elapsed.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/csum.py
-,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py
+#,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/tagFilter.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/projectionDesc.py
 ,,n,system-test,python3 ./test.py -f 2-query/queryQnode.py
@@ -477,7 +477,7 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/csum.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/mavg.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/sample.py -Q 2
-,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py -Q 2
+#,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/unique.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/stateduration.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_stateduration.py -Q 2
@@ -572,7 +572,7 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/csum.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/mavg.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/sample.py -Q 3
-,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py -Q 3
+#,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/unique.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/stateduration.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_stateduration.py -Q 3
@@ -668,7 +668,7 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/mavg.py -Q 4
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/sample.py -Q 4
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/cast.py -Q 4
-,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py -Q 4
+#,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py -Q 4
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/unique.py -Q 4
 #,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/stateduration.py -Q 4
 #,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_stateduration.py -Q 4