diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8e34fc9ddb5beb2ae5a4b072fb0f0158d08fabaf..aa02a023cd453de3ab160dcb18da7a28e70c7a8c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.4.0
+* Changes were made to internal testing infrastructure, but nothing that will
+  affect users of Lightning Workflow.
+
 ## 3.3.0
 * Updated Lightning Core to 3.5, which security updates Drupal core to 8.6.6.
 * Made the time steps in Lightning Scheduler's UI configurable. (Issue #2981050)
diff --git a/composer.json b/composer.json
index ecb1a2e6b6681d1577b6c94315cf01b54dfbe096..2abe2f08e80bf49c0678403d2082fb2612408e9e 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
         "cweagans/composer-patches": "^1.6.4",
         "drupal-composer/drupal-scaffold": "^2.0.0",
         "drupal/diff": "^1.0",
-        "drupal/lightning_core": "3.x-dev",
+        "drupal/lightning_core": "^3.6",
         "drupal/moderation_dashboard": "^1.0",
         "drupal/moderation_sidebar": "^1.0",
         "oomphinc/composer-installers-extender": "^1.1"
diff --git a/tests/fixtures/3.4.0.php.gz b/tests/fixtures/3.4.0.php.gz
new file mode 100644
index 0000000000000000000000000000000000000000..bf01d723e22db127415730e7a742cb9536f31dce
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