diff --git a/.circleci/unittest-config.yml b/.circleci/unittest-config.yml
index 9c782beb..ad8da292 100644
--- a/.circleci/unittest-config.yml
+++ b/.circleci/unittest-config.yml
@@ -71,7 +71,7 @@ jobs:
             set +e
             declare -i test_status
             pip install numpy
-            bazel test //engine/... -c opt --ui_event_filters=-info,-debug,-warning --test_output=errors | tee test_result.log; test_status=${PIPESTATUS[0]}
+            bazel --host_jvm_args=-Xmx16g test //engine/... -c opt --jobs=10 --ui_event_filters=-info,-debug,-warning --test_output=errors | tee test_result.log; test_status=${PIPESTATUS[0]}
 
             sh ../devtools/rename-junit-xml.sh
             find bazel-bin/ -executable -type f -name "*_test"  -print0 | xargs -0 tar -cvzf test_binary.tar.gz
@@ -131,7 +131,7 @@ jobs:
             set +e
             declare -i test_status
             pip install numpy
-            bazel test //engine/... -c opt --ui_event_filters=-info,-debug,-warning --test_output=errors| tee test_result.log; test_status=${PIPESTATUS[0]}
+            bazel --host_jvm_args=-Xmx16g test //engine/... -c opt --jobs=10 --ui_event_filters=-info,-debug,-warning --test_output=errors| tee test_result.log; test_status=${PIPESTATUS[0]}
 
             sh ../devtools/rename-junit-xml.sh
             find bazel-bin/ -perm +111 -type f -name "*_test"  -print0 | xargs -0 tar -cvzf test_binary.tar.gz