diff --git a/packages/babel-runtime-corejs2/helpers/esm/temporalRef.js b/packages/babel-runtime-corejs2/helpers/esm/temporalRef.js
index 4b0679c64cfc..6d167a30397b 100644
--- a/packages/babel-runtime-corejs2/helpers/esm/temporalRef.js
+++ b/packages/babel-runtime-corejs2/helpers/esm/temporalRef.js
@@ -1,8 +1,5 @@
 import undef from "./temporalUndefined";
+import err from "./tdz";
 export default function _temporalRef(val, name) {
-  if (val === undef) {
-    throw new ReferenceError(name + " is not defined - temporal dead zone");
-  } else {
-    return val;
-  }
+  return val === undef ? err(name) : val;
 }
\ No newline at end of file
diff --git a/packages/babel-runtime-corejs2/helpers/temporalRef.js b/packages/babel-runtime-corejs2/helpers/temporalRef.js
index 20b2652a1f8c..8aa5e5e58dcb 100644
--- a/packages/babel-runtime-corejs2/helpers/temporalRef.js
+++ b/packages/babel-runtime-corejs2/helpers/temporalRef.js
@@ -1,11 +1,9 @@
 var temporalUndefined = require("./temporalUndefined");
 
+var tdz = require("./tdz");
+
 function _temporalRef(val, name) {
-  if (val === temporalUndefined) {
-    throw new ReferenceError(name + " is not defined - temporal dead zone");
-  } else {
-    return val;
-  }
+  return val === temporalUndefined ? tdz(name) : val;
 }
 
 module.exports = _temporalRef;
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/esm/temporalRef.js b/packages/babel-runtime/helpers/esm/temporalRef.js
index 4b0679c64cfc..6d167a30397b 100644
--- a/packages/babel-runtime/helpers/esm/temporalRef.js
+++ b/packages/babel-runtime/helpers/esm/temporalRef.js
@@ -1,8 +1,5 @@
 import undef from "./temporalUndefined";
+import err from "./tdz";
 export default function _temporalRef(val, name) {
-  if (val === undef) {
-    throw new ReferenceError(name + " is not defined - temporal dead zone");
-  } else {
-    return val;
-  }
+  return val === undef ? err(name) : val;
 }
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/temporalRef.js b/packages/babel-runtime/helpers/temporalRef.js
index 20b2652a1f8c..8aa5e5e58dcb 100644
--- a/packages/babel-runtime/helpers/temporalRef.js
+++ b/packages/babel-runtime/helpers/temporalRef.js
@@ -1,11 +1,9 @@
 var temporalUndefined = require("./temporalUndefined");
 
+var tdz = require("./tdz");
+
 function _temporalRef(val, name) {
-  if (val === temporalUndefined) {
-    throw new ReferenceError(name + " is not defined - temporal dead zone");
-  } else {
-    return val;
-  }
+  return val === temporalUndefined ? tdz(name) : val;
 }
 
 module.exports = _temporalRef;
\ No newline at end of file
diff --git a/packages/babel-types/src/asserts/generated/index.js b/packages/babel-types/src/asserts/generated/index.js
index c21db148f2c3..c50116b309d5 100644
--- a/packages/babel-types/src/asserts/generated/index.js
+++ b/packages/babel-types/src/asserts/generated/index.js
@@ -8,9 +8,8 @@ import is from "../../validators/is";
 function assert(type: string, node: Object, opts?: Object): void {
   if (!is(type, node, opts)) {
     throw new Error(
-      `Expected type "${type}" with option ${JSON.stringify(
-        (opts: any),
-      )}, but instead got "${node.type}".`,
+      `Expected type "${type}" with option ${JSON.stringify((opts: any))}, ` +
+        `but instead got "${node.type}".`,
     );
   }
 }