Update TESTING.md
diff --git a/TESTING.md b/TESTING.md
index a690afe..ba9e32f 100644
--- a/TESTING.md
+++ b/TESTING.md
@@ -6,7 +6,7 @@
 ```shell
 # quick sanity check
 time (make -j4 CPPFLAGS='-DHB_DEBUG_SUBSET=100' \
-  && {make -j4 -C test/api check || cat test/api/test-suite.log})
+  && (make -j4 -C test/api check || cat test/api/test-suite.log))
 
 # slower sanity check
 time (make -j4 CPPFLAGS='-DHB_DEBUG_SUBSET=100' \
@@ -22,6 +22,13 @@
 make distcheck
 ```
 
+### Run tests with asan
+
+```shell
+./configure CC=clang CXX=clang++ CPPFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address
+# make/run tests as usual
+```
+
 ### Debug with GDB
 
 ```