diff --git a/tools/server/tests/tests.sh b/tools/server/tests/tests.sh
index c7d5d78059..fd83b7fd54 100755
--- a/tools/server/tests/tests.sh
+++ b/tools/server/tests/tests.sh
@@ -8,13 +8,19 @@ set -eu
 
 WORKERS="${PYTEST_WORKERS:-4}"
 
+if [ "${WORKERS}" -eq 1 ]; then
+    WORKER_FLAGS=""
+else
+    WORKER_FLAGS="-n ${WORKERS} --dist=worksteal"
+fi
+
 if [ $# -lt 1 ]
 then
     if [[ "${SLOW_TESTS:-0}" == 1 ]]; then
-        pytest --durations=30 -v -x -n "${WORKERS}" --dist=worksteal
+        pytest --durations=30 -v -x ${WORKER_FLAGS}
     else
-        pytest --durations=30 -v -x -n "${WORKERS}" --dist=worksteal -m "not slow"
+        pytest --durations=30 -v -x ${WORKER_FLAGS} -m "not slow"
     fi
 else
-    pytest --durations=30 -n "${WORKERS}" --dist=worksteal "$@"
+    pytest --durations=30 ${WORKER_FLAGS} "$@"
 fi