diff --git a/.ci/teamcity/oss/jest.sh b/.ci/teamcity/oss/jest.sh
index b323a88ef06bc..6d9396574c077 100755
--- a/.ci/teamcity/oss/jest.sh
+++ b/.ci/teamcity/oss/jest.sh
@@ -10,4 +10,4 @@ source "$(dirname "${0}")/../util.sh"
 export JOB=kibana-oss-jest
 
 checks-reporter-with-killswitch "Jest Unit Tests" \
-  node scripts/jest --ci --verbose
+  node scripts/jest --ci --maxWorkers=5 --verbose
diff --git a/.ci/teamcity/tests/jest.sh b/.ci/teamcity/tests/jest.sh
index c8b9b075e0e61..3d60915c1b1b5 100755
--- a/.ci/teamcity/tests/jest.sh
+++ b/.ci/teamcity/tests/jest.sh
@@ -7,4 +7,4 @@ source "$(dirname "${0}")/../util.sh"
 export JOB=kibana-jest
 
 checks-reporter-with-killswitch "Jest Unit Tests" \
-  node scripts/jest --ci --verbose --coverage
+  node scripts/jest --ci --maxWorkers=5 --verbose
diff --git a/test/scripts/test/jest_unit.sh b/test/scripts/test/jest_unit.sh
index 14d7268c6f36d..06c159c0a4ace 100755
--- a/test/scripts/test/jest_unit.sh
+++ b/test/scripts/test/jest_unit.sh
@@ -3,4 +3,4 @@
 source src/dev/ci_setup/setup_env.sh
 
 checks-reporter-with-killswitch "Jest Unit Tests" \
-  node scripts/jest --ci --verbose --maxWorkers=10 --coverage
+  node scripts/jest --ci --verbose --maxWorkers=6 --coverage