diff --git a/packages/redux-devtools-cli/test/integration.spec.ts b/packages/redux-devtools-cli/test/integration.spec.ts
index ed2c04c6..c30b4173 100644
--- a/packages/redux-devtools-cli/test/integration.spec.ts
+++ b/packages/redux-devtools-cli/test/integration.spec.ts
@@ -17,7 +17,7 @@ describe('Server', function () {
 
   describe('Express backend', function () {
     it('loads main page', function () {
-      return new Promise((done) => {
+      return new Promise<void>((done) => {
         // eslint-disable-next-line @typescript-eslint/no-floating-promises
         request('http://localhost:8000')
           .get('/')
@@ -64,7 +64,7 @@ describe('Server', function () {
     });
 
     it('should connect', function () {
-      return new Promise((done) => {
+      return new Promise<void>((done) => {
         socket.on('connect', function (status) {
           expect(status.id).toBeTruthy();
           done();
@@ -89,7 +89,7 @@ describe('Server', function () {
     });
 
     it('should send message', function () {
-      return new Promise((done) => {
+      return new Promise<void>((done) => {
         const data = {
           type: 'ACTION',
           payload: {
@@ -146,7 +146,7 @@ describe('Server', function () {
         'AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36',
     };
     it('should add a report', function () {
-      return new Promise((done) => {
+      return new Promise<void>((done) => {
         // eslint-disable-next-line @typescript-eslint/no-floating-promises
         request('http://localhost:8000')
           .post('/')
@@ -163,7 +163,7 @@ describe('Server', function () {
     });
 
     it('should get the report', function () {
-      return new Promise((done) => {
+      return new Promise<void>((done) => {
         // eslint-disable-next-line @typescript-eslint/no-floating-promises
         request('http://localhost:8000')
           .post('/')
@@ -182,7 +182,7 @@ describe('Server', function () {
     });
 
     it('should list reports', function () {
-      return new Promise((done) => {
+      return new Promise<void>((done) => {
         // eslint-disable-next-line @typescript-eslint/no-floating-promises
         request('http://localhost:8000')
           .post('/')
@@ -207,7 +207,7 @@ describe('Server', function () {
 
   describe('GraphQL backend', function () {
     it('should get the report', function () {
-      return new Promise((done) => {
+      return new Promise<void>((done) => {
         // eslint-disable-next-line @typescript-eslint/no-floating-promises
         request('http://localhost:8000')
           .post('/graphql')
diff --git a/packages/redux-devtools-inspector-monitor-trace-tab/test/StackTraceTab.spec.tsx b/packages/redux-devtools-inspector-monitor-trace-tab/test/StackTraceTab.spec.tsx
index 6e708d70..8e3a5c1d 100644
--- a/packages/redux-devtools-inspector-monitor-trace-tab/test/StackTraceTab.spec.tsx
+++ b/packages/redux-devtools-inspector-monitor-trace-tab/test/StackTraceTab.spec.tsx
@@ -33,14 +33,14 @@ const StackTraceTabAsAny = StackTraceTab as any;
 
 describe('StackTraceTab component', () => {
   it('should render with no props', () => {
-    return new Promise((done) => {
+    return new Promise<void>((done) => {
       const component = mount(<StackTraceTabAsAny />);
       genAsyncSnapshot(component, done);
     });
   });
 
   it('should render with props, but without stack', () => {
-    return new Promise((done) => {
+    return new Promise<void>((done) => {
       const component = mount(
         <StackTraceTabAsAny actions={actions} action={actions[0].action} />
       );
@@ -49,7 +49,7 @@ describe('StackTraceTab component', () => {
   });
 
   it('should render the link to docs', () => {
-    return new Promise((done) => {
+    return new Promise<void>((done) => {
       const component = mount(
         <StackTraceTabAsAny actions={actions} action={actions[1].action} />
       );
@@ -58,7 +58,7 @@ describe('StackTraceTab component', () => {
   });
 
   it('should render with trace stack', () => {
-    return new Promise((done) => {
+    return new Promise<void>((done) => {
       const component = mount(
         <StackTraceTabAsAny actions={actions} action={actions[2].action} />
       );
diff --git a/packages/redux-devtools-instrument/test/instrument.spec.ts b/packages/redux-devtools-instrument/test/instrument.spec.ts
index b7667f57..935ab43e 100644
--- a/packages/redux-devtools-instrument/test/instrument.spec.ts
+++ b/packages/redux-devtools-instrument/test/instrument.spec.ts
@@ -1071,7 +1071,7 @@ describe('instrument', () => {
     });
 
     it('should get stack trace inside setTimeout using a function', () =>
-      new Promise((done) => {
+      new Promise<void>((done) => {
         const stack = new Error().stack;
         setTimeout(() => {
           const traceFn = () => stack! + new Error().stack!;