diff --git a/sdlib/d/gc/tcache.d b/sdlib/d/gc/tcache.d
index 267032c38..d23e764be 100644
--- a/sdlib/d/gc/tcache.d
+++ b/sdlib/d/gc/tcache.d
@@ -439,7 +439,7 @@ unittest getCapacity {
 	assert(threadCache.getCapacity(p5[0 .. 16000]) == 20480);
 }
 
-unittest Extend {
+unittest extend {
 	auto nonAppendable = threadCache.alloc(100, false);
 
 	// Attempt to extend a non-appendable: