diff --git a/8_4_Testing_a_Bitcoin_Script.md b/8_5_Testing_a_Bitcoin_Script.md
similarity index 99%
rename from 8_4_Testing_a_Bitcoin_Script.md
rename to 8_5_Testing_a_Bitcoin_Script.md
index 25e36ce..7c4611f 100644
--- a/8_4_Testing_a_Bitcoin_Script.md
+++ b/8_5_Testing_a_Bitcoin_Script.md
@@ -1,6 +1,6 @@
 > **WARNING:** This section is of limited utility due to a lack of good test sites and test suites.
 
-# 8.4: Testing a Bitcoin Script
+# 8.5: Testing a Bitcoin Script
 
 > **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning.