diff --git a/test_frontend.sh b/test_frontend.sh
index 8c5d15305..cee196a9a 100755
--- a/test_frontend.sh
+++ b/test_frontend.sh
@@ -1,7 +1,29 @@
 #!/bin/sh
+# Typecheck and lint run in parallel (both are read-only and independent),
+# then the tests. Exits non-zero if any step fails, so a type or lint error
+# can't scroll past unnoticed behind a green test run.
+
+cd frontend || exit 1
+
+npm run typecheck > /tmp/bambuddy-typecheck.$$ 2>&1 &
+typecheck_pid=$!
+npm run lint > /tmp/bambuddy-lint.$$ 2>&1 &
+lint_pid=$!
+
+wait $typecheck_pid
+typecheck_rc=$?
+wait $lint_pid
+lint_rc=$?
+
+cat /tmp/bambuddy-typecheck.$$ /tmp/bambuddy-lint.$$
+rm -f /tmp/bambuddy-typecheck.$$ /tmp/bambuddy-lint.$$
 
-cd frontend
-npm run typecheck
-npm run lint
 npm run test:run
+test_rc=$?
+
 cd ..
+
+if [ $typecheck_rc -ne 0 ] || [ $lint_rc -ne 0 ] || [ $test_rc -ne 0 ]; then
+    echo "FAILED: typecheck=$typecheck_rc lint=$lint_rc tests=$test_rc"
+    exit 1
+fi