diff --git a/docs/book/v3/testing.md b/docs/book/v3/README.md
similarity index 100%
rename from docs/book/v3/testing.md
rename to docs/book/v3/README.md
diff --git a/docs/book/v3/SUMMARY.md b/docs/book/v3/SUMMARY.md
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--- /dev/null
+++ b/docs/book/v3/SUMMARY.md
@@ -0,0 +1,3 @@
+# Table of contents
+
+* [test book](README.md)