diff --git a/package.json b/package.json
index b9ae8cea77..355c6c07e3 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "test:lint": "eslint src --ext .ts",
     "test:prettier": "prettier \"src/**/*.ts\" --list-different",
     "test:spelling": "cspell \"{README.md,.github/*.md,src/**/*.ts}\"",
-    "test:unit": "nyc --silent mocha",
+    "test:unit": "nyc --silent mocha --exit",
     "test:lint-proto": "buf lint",
     "check-cli": "run-s test diff-integration-tests check-integration-tests",
     "check-integration-tests": "run-s check-integration-test:*",
diff --git a/src/lib/waku_relay.spec.ts b/src/lib/waku_relay.spec.ts
index dc2bd039ee..1e92dc3394 100644
--- a/src/lib/waku_relay.spec.ts
+++ b/src/lib/waku_relay.spec.ts
@@ -91,6 +91,8 @@ describe('Waku Relay', () => {
     });
 
     it('Js publishes to nim', async function () {
+      this.timeout(5000);
+
       const message = Message.fromUtf8String('This is a message');
       // TODO: nim-waku does follow the `StrictNoSign` policy hence we need to change
       // it for nim-waku to process our messages. Can be removed once
diff --git a/src/test_utils/nim_waku.ts b/src/test_utils/nim_waku.ts
index 89d2b37f88..805be37419 100644
--- a/src/test_utils/nim_waku.ts
+++ b/src/test_utils/nim_waku.ts
@@ -79,6 +79,7 @@ export class NimWaku {
 
   public stop() {
     this.process ? this.process.kill('SIGINT') : null;
+    this.process = undefined;
   }
 
   async waitForLog(msg: string) {