diff --git a/package.json b/package.json
index 7dde7ab4f67fbd..9578d6d4c03df8 100644
--- a/package.json
+++ b/package.json
@@ -136,7 +136,7 @@
     "size-limit": "^0.21.0",
     "ts-node": "^8.3.0",
     "tslint": "5.14.0",
-    "typescript": "^3.7.4",
+    "typescript": "^3.8.1-rc",
     "typescript-to-proptypes": "^1.4.0",
     "vrtest": "^0.2.0",
     "webpack": "^4.41.0",
diff --git a/packages/material-ui-styles/src/makeStyles/makeStyles.spec.tsx b/packages/material-ui-styles/src/makeStyles/makeStyles.spec.tsx
index 9d3fe1cc7d77a4..823516f48dbfd6 100644
--- a/packages/material-ui-styles/src/makeStyles/makeStyles.spec.tsx
+++ b/packages/material-ui-styles/src/makeStyles/makeStyles.spec.tsx
@@ -107,8 +107,8 @@ import { createStyles, makeStyles } from '@material-ui/styles';
     defaultTheme: validCustomTheme,
   });
 
-  // $ExpectError
   makeStyles(style, {
+    // $ExpectError
     defaultTheme: invalidCustomTheme,
   });
 
diff --git a/packages/material-ui-styles/test/styles.spec.tsx b/packages/material-ui-styles/test/styles.spec.tsx
index 9b6f271afdf4e5..03bcc37a288ab6 100644
--- a/packages/material-ui-styles/test/styles.spec.tsx
+++ b/packages/material-ui-styles/test/styles.spec.tsx
@@ -164,9 +164,9 @@ withStyles(theme =>
     content: {
       minHeight: '100vh',
     },
-    // $ExpectError
     '@media (min-width: 960px)': {
       content: {
+        // $ExpectError
         display: 'flex',
       },
     },
diff --git a/packages/material-ui/test/typescript/styles.spec.tsx b/packages/material-ui/test/typescript/styles.spec.tsx
index c5c5073b1c72c4..baa564bd37e019 100644
--- a/packages/material-ui/test/typescript/styles.spec.tsx
+++ b/packages/material-ui/test/typescript/styles.spec.tsx
@@ -263,9 +263,9 @@ withStyles(theme =>
     content: {
       minHeight: '100vh',
     },
-    // $ExpectError
     '@media (min-width: 960px)': {
       content: {
+        // $ExpectError
         display: 'flex',
       },
     },
diff --git a/yarn.lock b/yarn.lock
index 63a1e3420c162f..c9f5e8870a89d2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -14829,10 +14829,10 @@ typescript@3.5.2:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.2.tgz#a09e1dc69bc9551cadf17dba10ee42cf55e5d56c"
   integrity sha512-7KxJovlYhTX5RaRbUdkAXN1KUZ8PwWlTzQdHV6xNqvuFOs7+WBo10TQUqT19Q/Jz2hk5v9TQDIhyLhhJY4p5AA==
 
-typescript@^3.7.4, typescript@next:
-  version "3.7.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.7.4.tgz#1743a5ec5fef6a1fa9f3e4708e33c81c73876c19"
-  integrity sha512-A25xv5XCtarLwXpcDNZzCGvW2D1S3/bACratYBx2sax8PefsFhlYmkQicKHvpYflFS8if4zne5zT5kpJ7pzuvw==
+typescript@^3.8.1-rc, typescript@next:
+  version "3.8.1-rc"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.1-rc.tgz#f94333c14da70927ccd887be2e91be652a9a09f6"
+  integrity sha512-aOIe066DyZn2uYIiND6fXMUUJ70nxwu/lKhA92QuQzXyC86fr0ywo1qvO8l2m0EnDcfjprYPuFRgNgDj7U2GlQ==
 
 uglify-js@^3.1.4:
   version "3.7.2"