diff --git a/packages/gatsby-plugin-coffeescript/src/__tests__/__snapshots__/gatsby-node.js.snap b/packages/gatsby-plugin-coffeescript/src/__tests__/__snapshots__/gatsby-node.js.snap
index d232a3d32d254..a1f68567b3b26 100644
--- a/packages/gatsby-plugin-coffeescript/src/__tests__/__snapshots__/gatsby-node.js.snap
+++ b/packages/gatsby-plugin-coffeescript/src/__tests__/__snapshots__/gatsby-node.js.snap
@@ -1,29 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`gatsby-plugin-coffeescript contains coffee script extensions 1`] = `
-Array [
-  ".coffee",
-]
-`;
-
-exports[`gatsby-plugin-coffeescript modifies webpack config with cofeescript extensions 1`] = `
-Array [
-  Object {
-    "module": Object {
-      "rules": Array [
-        Object {
-          "test": /\\\\\\.coffee\\$/,
-          "use": Array [
-            "babel-loader",
-            "/resolved/path/coffee-loader",
-          ],
-        },
-      ],
-    },
-  },
-]
-`;
-
 exports[`gatsby-plugin-coffeescript pre processing transforms .coffee files 1`] = `
 "(function() {
   if (typeof elvis !== \\"undefined\\" && elvis !== null) {
diff --git a/packages/gatsby-plugin-coffeescript/src/__tests__/gatsby-node.js b/packages/gatsby-plugin-coffeescript/src/__tests__/gatsby-node.js
index 339528750d31a..11903cb34ad66 100644
--- a/packages/gatsby-plugin-coffeescript/src/__tests__/gatsby-node.js
+++ b/packages/gatsby-plugin-coffeescript/src/__tests__/gatsby-node.js
@@ -8,10 +8,10 @@ const {
 
 describe(`gatsby-plugin-coffeescript`, () => {
   it(`contains coffee script extensions`, () => {
-    expect(resolvableExtensions()).toMatchSnapshot()
+    expect(resolvableExtensions()).toContain(`.coffee`)
   })
 
-  it(`modifies webpack config with cofeescript extensions`, () => {
+  it(`modifies webpack config with coffeescript extensions`, () => {
     const actions = {
       setWebpackConfig: jest.fn(),
     }
@@ -23,8 +23,16 @@ describe(`gatsby-plugin-coffeescript`, () => {
       resolvableExtensions().length
     )
 
-    const lastCall = actions.setWebpackConfig.mock.calls.pop()
-    expect(lastCall).toMatchSnapshot()
+    expect(actions.setWebpackConfig).toHaveBeenLastCalledWith({
+      module: {
+        rules: [
+          {
+            test: /\.coffee$/,
+            use: [`babel-loader`, `/resolved/path/coffee-loader`],
+          },
+        ],
+      },
+    })
   })
 
   describe(`pre processing`, () => {