      });
    });
 diff --git a/packages/material-ui/src/internal/SwitchBase.test.js b/packages/material-ui/src/internal/SwitchBase.test.js
-index 3f26a11e1b..3732eb2e9a 100644
+index 2753fb3257..011a312021 100644
 --- a/packages/material-ui/src/internal/SwitchBase.test.js
 +++ b/packages/material-ui/src/internal/SwitchBase.test.js
-@@ -393,7 +393,7 @@ describe('<SwitchBase />', () => {
+@@ -391,7 +391,7 @@ describe('<SwitchBase />', () => {
          setProps({ checked: true });
-         global['didWarnControlledToUncontrolled'] = true;
+         global.didWarnControlledToUncontrolled = true;
        }).toErrorDev([
 -        'Warning: A component is changing an uncontrolled input of type checkbox to be controlled.',
 +        'Warning: A component is changing an uncontrolled input to be controlled.',
          'Material-UI: A component is changing the uncontrolled checked state of SwitchBase to be controlled.',
        ]);
      });
-@@ -414,7 +414,7 @@ describe('<SwitchBase />', () => {
+@@ -412,7 +412,7 @@ describe('<SwitchBase />', () => {
          setProps({ checked: undefined });
-         global['didWarnControlledToUncontrolled'] = true;
+         global.didWarnControlledToUncontrolled = true;
        }).toErrorDev([
 -        'Warning: A component is changing a controlled input of type checkbox to be uncontrolled.',
 +        'Warning: A component is changing a controlled input to be uncontrolled',

   ];
 
diff --git a/packages/material-ui-styles/src/ThemeProvider/ThemeProvider.test.js b/packages/material-ui-styles/src/ThemeProvider/ThemeProvider.test.js
index cab486d9db..3107739555 100644
--- a/packages/material-ui-styles/src/ThemeProvider/ThemeProvider.test.js
+++ b/packages/material-ui-styles/src/ThemeProvider/ThemeProvider.test.js
@@ -122,11 +122,7 @@ describe('ThemeProvider', () => {

         `Material-UI: You are using a variant value \`test\` for which you didn't define styles.`,
         `Please create a new variant matcher in your theme for this variant. To learn more about matchers visit https://next.material-ui.com/r/custom-component-variants.`,
diff --git a/packages/material-ui/src/Autocomplete/Autocomplete.test.js b/packages/material-ui/src/Autocomplete/Autocomplete.test.js
index 2556f4d94d..787fc72d3b 100644
--- a/packages/material-ui/src/Autocomplete/Autocomplete.test.js
+++ b/packages/material-ui/src/Autocomplete/Autocomplete.test.js
@@ -1192,10 +1192,6 @@ describe('<Autocomplete />', () => {
         fireEvent.change(textbox, { target: { value: 'a' } });
         fireEvent.keyDown(textbox, { key: 'Enter' });
       }).toErrorDev([
