diff --git a/tools/dicttool/tests/etc/test-dicttool.sh b/tools/dicttool/tests/etc/test-dicttool.sh
index 5eb44fc..f96db68 100755
--- a/tools/dicttool/tests/etc/test-dicttool.sh
+++ b/tools/dicttool/tests/etc/test-dicttool.sh
@@ -18,7 +18,7 @@
 echo "    source $0" 1>&2
 echo "  or" 1>&2
 echo "    . $0" 1>&2
-exit 1
+if [[ ${BASH_SOURCE[0]} != $0 ]]; then return; else exit 1; fi
 fi
 
 find out -name "dicttool_aosp*" -exec rm -rf {} \; > /dev/null 2>&1