diff --git a/_data/modules.yml b/_data/modules.yml
index 2c1b8c0..d3d8ecc 100644
--- a/_data/modules.yml
+++ b/_data/modules.yml
@@ -9,7 +9,7 @@
   page: /modules/2-requirements-to-code
 2a:
   name: What Makes a Good Test Suite?
-  page: 
+  page: /modules/3-test-adequacy
 2b:
   name: Code-Level Design Principles
   page: /modules/4-code-level-design
diff --git a/lectures/l03.md b/lectures/l3.md
similarity index 97%
rename from lectures/l03.md
rename to lectures/l3.md
index 1a17ae1..fd9d1f9 100644
--- a/lectures/l03.md
+++ b/lectures/l3.md
@@ -1,7 +1,7 @@
 ---
 layout: module
 title: "3 - Test Adequacy"
-permalink: /modules/03-test-adequacy
+permalink: /modules/3-test-adequacy
 parent: Modules
 nav_order: 03
 lessons: