diff --git a/core/modules/text/config/schema/text.schema.yml b/core/modules/text/config/schema/text.schema.yml
new file mode 100644
index 0000000..4fbe45a
--- /dev/null
+++ b/core/modules/text/config/schema/text.schema.yml
@@ -0,0 +1,9 @@
+# Schema for the configuration files of the text module.
+
+text.settings:
+  type: mapping
+  label: 'Text settings'
+  mapping:
+    default_summary_length:
+      type: integer
+      label: 'Default summary length'