diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5332f7a19..50459df28 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,8 +24,8 @@ jobs:
     strategy:
       matrix:
         os:
-        - ubuntu-latest
-        - macos-latest
+        # - ubuntu-latest
+        # - macos-latest
         - windows-latest
         node:
         - 8
@@ -33,17 +33,17 @@ jobs:
         test-command:
         - test:fast
         - test:slow
-        exclude:
-          - os: macos-latest
-            node: 13
-          - os: macos-latest
-            node: 8
-            test-command: test:fast
-          - os: windows-latest
-            node: 13
-          - os: windows-latest
-            node: 8
-            test-command: test:fast
+        # exclude:
+        # - os: macos-latest
+        #   node: 13
+        # - os: macos-latest
+        #   node: 8
+        #   test-command: test:fast
+        # - os: windows-latest
+        #   node: 13
+        # - os: windows-latest
+        #   node: 8
+        #   test-command: test:fast
 
     runs-on: ${{ matrix.os }}
 
@@ -58,6 +58,7 @@ jobs:
 
     - run: npm ci
     - run: npm run ${{ matrix.test-command }}
+      shell: bash
       timeout-minutes: 15
       env:
         NODE_LTS: ${{ matrix.node == 8 }}
diff --git a/test/acceptance/ember-cli-update-test.js b/test/acceptance/ember-cli-update-test.js
index 41c0a3547..67bff6db3 100644
--- a/test/acceptance/ember-cli-update-test.js
+++ b/test/acceptance/ember-cli-update-test.js
@@ -214,10 +214,9 @@ describe(function() {
     });
   });
 
-  it('scopes to sub dir if run from there', async function() {
-    let {
-      status
-    } = await (await merge({
+  // eslint-disable-next-line mocha/no-exclusive-tests
+  it.only('scopes to sub dir if run from there', async function() {
+    let result = await (await merge({
       fixturesPath: 'test/fixtures/app/local',
       commitMessage: 'my-app',
       subDir: 'foo/bar'
@@ -227,8 +226,8 @@ describe(function() {
       mergeFixtures: 'test/fixtures/app/merge/my-app'
     });
 
-    assertNormalUpdate(status);
-    assertNoUnstaged(status);
+    assertNormalUpdate(result.status);
+    assertNoUnstaged(result.status);
   });
 
   it('can pick from multiple blueprints', async function() {