diff --git a/test/utest-led-yaml-group-priority.cpp b/test/utest-led-yaml-group-priority.cpp
index b257c17..c31a788 100644
--- a/test/utest-led-yaml-group-priority.cpp
+++ b/test/utest-led-yaml-group-priority.cpp
@@ -29,7 +29,7 @@
     EXPECT_EQ(group.priority, 1);
     EXPECT_EQ(group.actionSet.size(), 1);
 
-    for (auto& led : group.actionSet)
+    for (const auto& led : group.actionSet)
     {
         EXPECT_EQ(led.name, "led1");
         EXPECT_EQ(led.action, Action::On);
@@ -47,7 +47,7 @@
     EXPECT_EQ(group.priority, 2);
     EXPECT_EQ(group.actionSet.size(), 1);
 
-    for (auto& led : group.actionSet)
+    for (const auto& led : group.actionSet)
     {
         EXPECT_EQ(led.name, "led1");
         EXPECT_EQ(led.action, Action::Off);
@@ -65,7 +65,7 @@
     EXPECT_EQ(group.priority, 3);
     EXPECT_EQ(group.actionSet.size(), 1);
 
-    for (auto& led : group.actionSet)
+    for (const auto& led : group.actionSet)
     {
         EXPECT_EQ(led.name, "led1");
         EXPECT_EQ(led.action, Action::Blink);
@@ -86,7 +86,7 @@
     EXPECT_EQ(group.actionSet.size(), 2);
 
     int found = 0;
-    for (auto& led : group.actionSet)
+    for (const auto& led : group.actionSet)
     {
         if (led.name == "led1")
         {