diff --git a/check.sh b/check.sh
index 5579cb4b3a..c7fed0e942 100755
--- a/check.sh
+++ b/check.sh
@@ -104,6 +104,9 @@ run_redoxer() {
         redoxer toolchain || { echo -e "${RED}Fail: redoxer toolchain for: $target.${NC}" && exit 1; }
         export CARGO_TEST="redoxer"
         export TEST_RUNNER="redoxer exec --folder ../sysroot/$TARGET/:/usr --folder . --"
+# TODO: Identify hang issue with pthread/barrier and pthread/once tests in multi core to get rid of this limit
+        export REDOXER_QEMU_ARGS="-smp 1"
+
         MAKE_ACTION="$MAKE_ACTION IS_REDOX=1"
     else
         REDOXER_ENV=""