diff --git a/scripts/test-cov.sh b/scripts/test-cov.sh
index 6555cbddc2..6914ef3fb0 100755
--- a/scripts/test-cov.sh
+++ b/scripts/test-cov.sh
@@ -4,7 +4,7 @@ set -e
 jestArgs="--coverage"
 
 if [ -n "$CI" ]; then
-  jestArgs="${jestArgs} --runInBand --ci"
+  jestArgs="${jestArgs} --maxWorkers=4 --ci"
 fi
 
 node_modules/.bin/jest $jestArgs
diff --git a/scripts/test.sh b/scripts/test.sh
index 6c2d7bda06..04abbb17a3 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -14,7 +14,7 @@ if [ "$TEST_DEBUG" ]; then
 fi
 
 if [ -n "$CI" ]; then
-  jestArgs="${jestArgs} --runInBand --ci"
+  jestArgs="${jestArgs} --maxWorkers=4 --ci"
 fi
 
 $node node_modules/.bin/jest $jestArgs "$TEST_GREP"