diff --git a/Note-testsuite.md b/Note-testsuite.md
index c03ffae..3eb1f6b 100644
--- a/Note-testsuite.md
+++ b/Note-testsuite.md
@@ -30,7 +30,7 @@ The test runner for these tests is at src/test/compiletest and is compiled to te
 
 A typical test might look like:
 
-```Rust
+```rust
 // xfail-pretty 'bool' doesn't pretty-print (#XXX)
 // Regression test for issue #YYY