diff --git a/test_runtime.sh b/test_runtime.sh
index b7746fcee..c4d0691f9 100755
--- a/test_runtime.sh
+++ b/test_runtime.sh
@@ -77,9 +77,7 @@ trap cleanup EXIT
 tar -xf  rootfs.tar.gz -C ${TESTDIR}
 cp runtimetest ${TESTDIR}
 
-pushd $TESTDIR > /dev/null
-ocitools generate --output config.json "${TEST_ARGS[@]}" --rootfs '.'
-popd > /dev/null
+ocitools generate --output "${TESTDIR}/config.json" "${TEST_ARGS[@]}" --rootfs '.'
 
 TESTCMD="${RUNTIME} start $(uuidgen)"
 pushd $TESTDIR > /dev/null