diff --git a/include/villas/nodes/test_rtt.hpp b/include/villas/nodes/test_rtt.hpp
index 75e79bc99..c33db2d8c 100644
--- a/include/villas/nodes/test_rtt.hpp
+++ b/include/villas/nodes/test_rtt.hpp
@@ -77,6 +77,11 @@ protected:
 
   bool shutdown;
 
+  virtual int _read(struct Sample *smps[], unsigned cnt);
+
+  virtual int _write(struct Sample *smps[], unsigned cnt);
+
+public:
   enum Mode {
     UNKNOWN,
     MIN,
@@ -87,11 +92,6 @@ protected:
     AT_LEAST_DURATION
   };
 
-  virtual int _read(struct Sample *smps[], unsigned cnt);
-
-  virtual int _write(struct Sample *smps[], unsigned cnt);
-
-public:
   TestRTT(const uuid_t &id = {}, const std::string &name = "")
       : Node(id, name), task(CLOCK_MONOTONIC), formatter(nullptr),
         stream(nullptr), shutdown(false) {}
diff --git a/lib/nodes/test_rtt.cpp b/lib/nodes/test_rtt.cpp
index 010234c31..9a82c9526 100644
--- a/lib/nodes/test_rtt.cpp
+++ b/lib/nodes/test_rtt.cpp
@@ -128,7 +128,7 @@ static enum TestRTT::Mode parseMode(const char *mode_str) {
   else if (strcmp(mode_str, "at_least_duration"))
     return TestRTT::Mode::AT_LEAST_DURATION;
   else
-    return TestRTT : Mode::UNKNOWN;
+    return TestRTT::Mode::UNKNOWN;
 }
 
 int TestRTT::parse(json_t *json) {
@@ -303,6 +303,8 @@ int TestRTT::parse(json_t *json) {
           if (count_effective < count_duration)
             count_effective = count_duration;
           break;
+
+        default: {}
         }
 
         auto filename = fmt::format("{}/{}_values{}_rate{}.log", output, prefix,