diff --git a/docs/tests/index.md b/docs/tests/index.md
index 7c03c7bb6b922b1a44801088f8a23b9ec2dd5b05..27fc4d758ff6fe47b261f84e11ac2dcc31d7e138 100644
--- a/docs/tests/index.md
+++ b/docs/tests/index.md
@@ -9,8 +9,14 @@ nav_order: 100
 
  The main documentation pages of this theme illustrate the use of many of its features, which to some extent tests their implementation. The pages linked below provide further test cases for particular features, and may be useful for regression testing when developing new features.
  
-The default configuration does not include the test pages. To include them, add the following option to `_config.yml':
+The default configuration does not include the test pages. To include them, *commment-out* the following line in `_config.yml`:
 
 ```yaml
-include: ["docs/tests/"]
+, "docs/tests/"
 ```
+so that it is:
+```yaml
+# , "docs/tests/"
+```
+
+(Apparently Jekyll's `include` does *not* override `exclude`  for the same folder...)