diff --git a/core/modules/simpletest/config/simpletest.schema.yml b/core/modules/simpletest/config/simpletest.schema.yml
new file mode 100644
index 0000000..566c9d1
--- /dev/null
+++ b/core/modules/simpletest/config/simpletest.schema.yml
@@ -0,0 +1,18 @@
+# Module settings
+simpletest.settings:
+  type: mapping
+  label: 'Simpletest settings'
+  mapping:
+    "clear_results":
+      type: boolean
+    "httpauth":
+      type: mapping
+      mapping:
+        "method":
+          type: integer
+        "password":
+          type: string
+        "username":
+          type: string
+    "verbose":
+      type: boolean