diff --git a/packages/babel-helper-fixtures/src/index.js b/packages/babel-helper-fixtures/src/index.js
index 9348fcc79af2..448331b72742 100644
--- a/packages/babel-helper-fixtures/src/index.js
+++ b/packages/babel-helper-fixtures/src/index.js
@@ -1,6 +1,5 @@
 import cloneDeep from "lodash/cloneDeep";
 import clone from "lodash/clone";
-import extend from "lodash/extend";
 import semver from "semver";
 import path from "path";
 import fs from "fs";
@@ -119,7 +118,7 @@ function pushTask(taskName, taskDir, suite, suiteName) {
   const taskOpts = cloneDeep(suite.options);
 
   const taskOptsLoc = tryResolve(taskDir + "/options");
-  if (taskOptsLoc) extend(taskOpts, require(taskOptsLoc));
+  if (taskOptsLoc) Object.assign(taskOpts, require(taskOptsLoc));
 
   const test = {
     optionsDir: taskOptsLoc ? path.dirname(taskOptsLoc) : null,
diff --git a/packages/babel-helper-transform-fixture-test-runner/src/index.js b/packages/babel-helper-transform-fixture-test-runner/src/index.js
index 1ff7233d1975..940b83a8cebb 100644
--- a/packages/babel-helper-transform-fixture-test-runner/src/index.js
+++ b/packages/babel-helper-transform-fixture-test-runner/src/index.js
@@ -7,7 +7,6 @@ import { codeFrameColumns } from "@babel/code-frame";
 import defaults from "lodash/defaults";
 import escapeRegExp from "lodash/escapeRegExp";
 import * as helpers from "./helpers";
-import extend from "lodash/extend";
 import merge from "lodash/merge";
 import resolve from "resolve";
 import assert from "assert";
@@ -380,7 +379,7 @@ export default function (
               sourceMap: !!(task.sourceMappings || task.sourceMap),
             });
 
-            extend(task.options, taskOpts);
+            Object.assign(task.options, taskOpts);
 
             if (dynamicOpts) dynamicOpts(task.options, task);