diff --git a/pkgs/guest/tf/freertos.nix b/pkgs/guest/tf/freertos.nix
index f51f9f1..de3fbd5 100644
--- a/pkgs/guest/tf/freertos.nix
+++ b/pkgs/guest/tf/freertos.nix
@@ -61,12 +61,12 @@ stdenv.mkDerivation rec {
         
         if [ "$ARCH" == "aarch64" ]; then
             make -C $out PLATFORM=${setup-cfg.platform_name} \
-                BAO_TEST=1 SUITES=${list_suites} TESTS=${list_tests} \
+                BAO_TEST=1 SUITES="${list_suites}" TESTS="${list_tests}" \
                 TESTF_LOG_LEVEL=${log_level} \
                 ${setup-cfg.irq_flags} $FREERTOS_PARAMS
         else
             make -C $out PLATFORM=${setup-cfg.platform_name} \
-                BAO_TEST=1 SUITES=${list_suites} TESTS=${list_tests} \
+                BAO_TEST=1 SUITES="${list_suites}" TESTS=${list_tests}" \
                 TESTF_LOG_LEVEL=${log_level} $FREERTOS_PARAMS
         fi
     '';