diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2b4d74d..577c9d4 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -97,7 +97,7 @@ jobs:
     steps:
       - name: Define Test Group Name
         id: test-group
-        uses: mad9000/actions-find-and-replace-string@5
+        uses: mad9000/actions-find-and-replace-string@6
         with:
           source: ${{ matrix.test-groups }}
           find: '/'        
@@ -235,9 +235,6 @@ jobs:
 
       - name: Start nginx
         run: sudo systemctl start nginx.service
-        
-      - name: Install chromedriver
-        uses: nanasess/setup-chromedriver@master
 
       - name: Start chromedriver
         run: |
@@ -262,22 +259,20 @@ jobs:
 
       # Write any secrets, such as API keys, to the .env.testing file now.
       - name: Define GitHub Secrets in .env.dist.testing
-        uses: DamianReeves/write-file-action@v1.3
-        with:
-          path: ${{ env.PLUGIN_DIR }}/.env.testing
-          contents: |
-            CONVERTKIT_API_KEY=${{ env.CONVERTKIT_API_KEY }}
-            CONVERTKIT_API_SECRET=${{ env.CONVERTKIT_API_SECRET }}
-            CONVERTKIT_API_KEY_NO_DATA=${{ env.CONVERTKIT_API_KEY_NO_DATA }}
-            CONVERTKIT_API_SECRET_NO_DATA=${{ env.CONVERTKIT_API_SECRET_NO_DATA }}
-            CONVERTKIT_OAUTH_ACCESS_TOKEN=${{ env.CONVERTKIT_OAUTH_ACCESS_TOKEN }}
-            CONVERTKIT_OAUTH_REFRESH_TOKEN=${{ env.CONVERTKIT_OAUTH_REFRESH_TOKEN }}
-            CONVERTKIT_OAUTH_ACCESS_TOKEN_NO_DATA=${{ env.CONVERTKIT_OAUTH_ACCESS_TOKEN_NO_DATA }}
-            CONVERTKIT_OAUTH_REFRESH_TOKEN_NO_DATA=${{ env.CONVERTKIT_OAUTH_REFRESH_TOKEN_NO_DATA }}
-            CONVERTKIT_OAUTH_CLIENT_ID=${{ env.CONVERTKIT_OAUTH_CLIENT_ID }}
-            CONVERTKIT_OAUTH_REDIRECT_URI=${{ env.CONVERTKIT_OAUTH_REDIRECT_URI }}
-            KIT_OAUTH_REDIRECT_URI=${{ env.KIT_OAUTH_REDIRECT_URI }}
-          write-mode: overwrite
+        run: |
+          cat > ${{ env.PLUGIN_DIR }}/.env.testing << 'ENVEOF'
+          CONVERTKIT_API_KEY=${{ env.CONVERTKIT_API_KEY }}
+          CONVERTKIT_API_SECRET=${{ env.CONVERTKIT_API_SECRET }}
+          CONVERTKIT_API_KEY_NO_DATA=${{ env.CONVERTKIT_API_KEY_NO_DATA }}
+          CONVERTKIT_API_SECRET_NO_DATA=${{ env.CONVERTKIT_API_SECRET_NO_DATA }}
+          CONVERTKIT_OAUTH_ACCESS_TOKEN=${{ env.CONVERTKIT_OAUTH_ACCESS_TOKEN }}
+          CONVERTKIT_OAUTH_REFRESH_TOKEN=${{ env.CONVERTKIT_OAUTH_REFRESH_TOKEN }}
+          CONVERTKIT_OAUTH_ACCESS_TOKEN_NO_DATA=${{ env.CONVERTKIT_OAUTH_ACCESS_TOKEN_NO_DATA }}
+          CONVERTKIT_OAUTH_REFRESH_TOKEN_NO_DATA=${{ env.CONVERTKIT_OAUTH_REFRESH_TOKEN_NO_DATA }}
+          CONVERTKIT_OAUTH_CLIENT_ID=${{ env.CONVERTKIT_OAUTH_CLIENT_ID }}
+          CONVERTKIT_OAUTH_REDIRECT_URI=${{ env.CONVERTKIT_OAUTH_REDIRECT_URI }}
+          KIT_OAUTH_REDIRECT_URI=${{ env.KIT_OAUTH_REDIRECT_URI }}
+          ENVEOF
 
       # Installs wp-browser, Codeception, PHP CodeSniffer and anything else needed to run tests.
       - name: Run Composer
diff --git a/composer.json b/composer.json
index eeb6d36..23a1ad6 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "project",
     "license": "GPLv3",
     "require": {
-        "convertkit/convertkit-wordpress-libraries": "2.1.6"
+        "convertkit/convertkit-wordpress-libraries": "2.1.7"
     },
     "require-dev": {
         "php-webdriver/webdriver": "^1.0",
diff --git a/tests/EndToEnd/forms/FormBackwardCompatCest.php b/tests/EndToEnd/forms/FormBackwardCompatCest.php
index 6c80d12..edb0686 100644
--- a/tests/EndToEnd/forms/FormBackwardCompatCest.php
+++ b/tests/EndToEnd/forms/FormBackwardCompatCest.php
@@ -323,8 +323,8 @@ public function testCreateFormWithInvalidCustomField(EndToEndTester $I)
 		$I->waitForElementVisible('.wpforms-confirmation-scroll');
 		$I->seeInSource('Thanks for contacting us! We will be in touch with you shortly.');
 
-		// Check subscriber does not exist, as specifying an invalid custom field will result in an API error.
-		$I->apiCheckSubscriberDoesNotExist($I, $emailAddress);
+		// Check API to confirm subscriber was sent.
+		$I->apiCheckSubscriberExists($I, $emailAddress, $firstName);
 	}
 
 	/**