diff --git a/packages/client/src/team/TeamManager.tsx b/packages/client/src/team/TeamManager.tsx
index 5292d78..33b4478 100644
--- a/packages/client/src/team/TeamManager.tsx
+++ b/packages/client/src/team/TeamManager.tsx
@@ -41,6 +41,7 @@ export class TeamManager extends React.PureComponent<ITeamManagerProps> {
     const action = this.props.createTeam(team)
     action.payload
     .then(() => this.props.history.push('/teams'))
+    .catch(() => {/* do nothing */})
     return action
   }
   render() {
diff --git a/packages/client/src/test-utils/TestUtils.tsx b/packages/client/src/test-utils/TestUtils.tsx
index 8f18c8e..fd852dc 100644
--- a/packages/client/src/test-utils/TestUtils.tsx
+++ b/packages/client/src/test-utils/TestUtils.tsx
@@ -31,10 +31,14 @@ export class TestUtils {
   readonly createStore = createStore
 
   render(jsx: JSX.Element) {
-    const component = T
-    .renderIntoDocument(jsx) as unknown as React.Component<any>
-    const node = ReactDOM.findDOMNode(component) as Element
-    return {component, node}
+    const $div = document.createElement('div')
+    const component = ReactDOM.render(
+      <div>{jsx}</div>, $div) as unknown as React.Component<any>
+    const node = (ReactDOM.findDOMNode(component) as Element).children[0]
+    return {
+      component,
+      node,
+    }
   }
 
   combineReducers<S>(reducers: ReducersMapObject<S, any>): Reducer<S>
diff --git a/packages/scripts/src/Subprocess.ts b/packages/scripts/src/Subprocess.ts
index 211bc74..e3746c8 100644
--- a/packages/scripts/src/Subprocess.ts
+++ b/packages/scripts/src/Subprocess.ts
@@ -26,8 +26,8 @@ export class Subprocess {
       })
 
       if (this.stdio === StdioOptions.PIPE) {
-        subprocess.stdout.on('data', data => process.stdout.write(data))
-        subprocess.stderr.on('data', data => process.stderr.write(data))
+        subprocess.stdout!.on('data', data => process.stdout.write(data))
+        subprocess.stderr!.on('data', data => process.stderr.write(data))
       }
 
       subprocess.on('close', code => {
diff --git a/packages/scripts/src/scripts/update.test.ts b/packages/scripts/src/scripts/update.test.ts
index bb465d0..d331bc0 100644
--- a/packages/scripts/src/scripts/update.test.ts
+++ b/packages/scripts/src/scripts/update.test.ts
@@ -10,9 +10,10 @@ describe('update', () => {
 
   const stringify = (obj: object) => JSON.stringify(obj, null, '  ')
 
-  const readMock = fs.readFileSync as jest.Mock<typeof fs.readFileSync>
+  const readMock =
+    fs.readFileSync as unknown as jest.Mock<typeof fs.readFileSync>
   const writeMock = fs.writeFileSync as jest.Mock<typeof fs.writeFileSync>
-  const cpMock = cp.execFileSync as jest.Mock<typeof cp.execFileSync>
+  const cpMock = cp.execFileSync as unknown as jest.Mock<typeof cp.execFileSync>
 
   let outdated: Record<string, IOutdated> = {}
   beforeEach(() => {
@@ -35,17 +36,17 @@ describe('update', () => {
       devDependencies: {
         b: '^3.4.6',
       },
-    }))
+    }) as any)
   })
 
   it('does not change when no changes', async () => {
-    cpMock.mockReturnValue('{}')
+    cpMock.mockReturnValue('{}' as any)
     await update('update', '/my/dir')
     expect(writeMock.mock.calls.length).toBe(0)
   })
 
   it('does not change when npm outdated output is empty', async () => {
-    cpMock.mockReturnValue('')
+    cpMock.mockReturnValue('' as any)
     await update('update', '/my/dir')
     expect(writeMock.mock.calls.length).toBe(0)
   })