diff --git a/llvm/utils/release/test-release.sh b/llvm/utils/release/test-release.sh
--- a/llvm/utils/release/test-release.sh
+++ b/llvm/utils/release/test-release.sh
@@ -484,6 +484,10 @@
 set -e
 set -o pipefail
 
+# Turn off core dumps, as some test cases can easily fill up even the largest
+# file systems.
+ulimit -c 0
+
 if [ "$do_checkout" = "yes" ]; then
     export_sources
 fi