Index: tests/unified_locking/.expect/exp_backoff.txt
===================================================================
--- tests/unified_locking/.expect/exp_backoff.txt	(revision 01a895482514fefa8e78d9b71b4863bc25600834)
+++ tests/unified_locking/.expect/exp_backoff.txt	(revision 01a895482514fefa8e78d9b71b4863bc25600834)
@@ -0,0 +1,3 @@
+Starting
+Done!
+Match!
Index: tests/unified_locking/exp_backoff.cfa
===================================================================
--- tests/unified_locking/exp_backoff.cfa	(revision 01a895482514fefa8e78d9b71b4863bc25600834)
+++ tests/unified_locking/exp_backoff.cfa	(revision 01a895482514fefa8e78d9b71b4863bc25600834)
@@ -0,0 +1,8 @@
+#include <locks.hfa>
+
+#define LOCK exp_backoff_then_block_lock
+#include "mutex_test.hfa"
+
+int main() {
+    test();
+}