diff --git a/analyzer/callout.hpp b/analyzer/callout.hpp
index 8c54793..06812a5 100644
--- a/analyzer/callout.hpp
+++ b/analyzer/callout.hpp
@@ -108,7 +108,7 @@
     }
 };
 
-inline const Procedure Procedure::NEXTLVL{"NEXTLVL"};
+inline const Procedure Procedure::NEXTLVL{"next_level_support"};
 
 /** @brief Container class for bus callout service actions. */
 class BusType
diff --git a/test/resolution_test.cpp b/test/resolution_test.cpp
index 82eb370..7738a27 100644
--- a/test/resolution_test.cpp
+++ b/test/resolution_test.cpp
@@ -329,7 +329,7 @@
     s = R"([
     {
         "Priority": "L",
-        "Procedure": "NEXTLVL"
+        "Procedure": "next_level_support"
     },
     {
         "Deconfigured": false,
@@ -605,7 +605,7 @@
     s = R"([
     {
         "Priority": "L",
-        "Procedure": "NEXTLVL"
+        "Procedure": "next_level_support"
     }
 ])";
     EXPECT_EQ(s, j.dump(4));
@@ -616,7 +616,7 @@
     {
         "Callout Type": "Procedure Callout",
         "Priority": "low",
-        "Procedure": "NEXTLVL"
+        "Procedure": "next_level_support"
     }
 ])";
     EXPECT_EQ(s, j.dump(4));