diff --git a/packages/babel-helpers/src/helpers.js b/packages/babel-helpers/src/helpers.js
index 7bb8038a3ce3..a000c2c9fc16 100644
--- a/packages/babel-helpers/src/helpers.js
+++ b/packages/babel-helpers/src/helpers.js
@@ -871,7 +871,7 @@ helpers.taggedTemplateLiteralLoose = helper("7.0.0-beta.0")`
 
 helpers.readOnlyError = helper("7.0.0-beta.0")`
   export default function _readOnlyError(name) {
-    throw new Error("\\"" + name + "\\" is read-only");
+    throw new TypeError("\\"" + name + "\\" is read-only");
   }
 `;
 
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/deadcode-violation/output.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/deadcode-violation/output.js
index cd1955d27991..20ade3085499 100644
--- a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/deadcode-violation/output.js
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/deadcode-violation/output.js
@@ -1,4 +1,4 @@
-function _readOnlyError(name) { throw new Error("\"" + name + "\" is read-only"); }
+function _readOnlyError(name) { throw new TypeError("\"" + name + "\" is read-only"); }
 
 (function () {
   var a = "foo";
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/destructuring-assignment/output.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/destructuring-assignment/output.js
index 1c642d30f3ca..2c6e0d3e5dd2 100644
--- a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/destructuring-assignment/output.js
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/destructuring-assignment/output.js
@@ -1,4 +1,4 @@
-function _readOnlyError(name) { throw new Error("\"" + name + "\" is read-only"); }
+function _readOnlyError(name) { throw new TypeError("\"" + name + "\" is read-only"); }
 
 var a = 1,
     b = 2;
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/loop/output.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/loop/output.js
index 8c07b3afab98..33cef8ad91b7 100644
--- a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/loop/output.js
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/loop/output.js
@@ -1,4 +1,4 @@
-function _readOnlyError(name) { throw new Error("\"" + name + "\" is read-only"); }
+function _readOnlyError(name) { throw new TypeError("\"" + name + "\" is read-only"); }
 
 for (var i = 0; i < 3; i = (_readOnlyError("i"), i + 1)) {
   console.log(i);
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/nested-update-expressions/output.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/nested-update-expressions/output.js
index 80e5f5ac116c..8bbef8353a42 100644
--- a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/nested-update-expressions/output.js
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/nested-update-expressions/output.js
@@ -1,4 +1,4 @@
-function _readOnlyError(name) { throw new Error("\"" + name + "\" is read-only"); }
+function _readOnlyError(name) { throw new TypeError("\"" + name + "\" is read-only"); }
 
 var c = 17;
 var a = 0;
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/no-assignment/output.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/no-assignment/output.js
index f6d05db78730..70fa89f31753 100644
--- a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/no-assignment/output.js
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/no-assignment/output.js
@@ -1,4 +1,4 @@
-function _readOnlyError(name) { throw new Error("\"" + name + "\" is read-only"); }
+function _readOnlyError(name) { throw new TypeError("\"" + name + "\" is read-only"); }
 
 var MULTIPLIER = 5;
 MULTIPLIER = (_readOnlyError("MULTIPLIER"), "overwrite");
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/no-for-in/output.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/no-for-in/output.js
index 30340cc04ab4..b5c79de3dc92 100644
--- a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/no-for-in/output.js
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/no-for-in/output.js
@@ -1,4 +1,4 @@
-function _readOnlyError(name) { throw new Error("\"" + name + "\" is read-only"); }
+function _readOnlyError(name) { throw new TypeError("\"" + name + "\" is read-only"); }
 
 var MULTIPLIER = 5;
 
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/update-expression-prefix/output.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/update-expression-prefix/output.js
index b9991508ece8..db8cdac701ab 100644
--- a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/update-expression-prefix/output.js
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/update-expression-prefix/output.js
@@ -1,4 +1,4 @@
-function _readOnlyError(name) { throw new Error("\"" + name + "\" is read-only"); }
+function _readOnlyError(name) { throw new TypeError("\"" + name + "\" is read-only"); }
 
 var a = "str";
 _readOnlyError("a"), --a;
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/update-expression/output.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/update-expression/output.js
index 392c434876a3..8c9e99ae4d93 100644
--- a/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/update-expression/output.js
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/const-violations/update-expression/output.js
@@ -1,4 +1,4 @@
-function _readOnlyError(name) { throw new Error("\"" + name + "\" is read-only"); }
+function _readOnlyError(name) { throw new TypeError("\"" + name + "\" is read-only"); }
 
 var foo = 1;
 _readOnlyError("foo"), foo++;
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/exec/constant-violation.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/exec/constant-violation.js
new file mode 100644
index 000000000000..ef249fcfae87
--- /dev/null
+++ b/packages/babel-plugin-transform-block-scoping/test/fixtures/exec/constant-violation.js
@@ -0,0 +1,2 @@
+const a = 1;
+expect(() => { a = 2 }).toThrow(TypeError);