diff --git a/application/argumentparser.cpp b/application/argumentparser.cpp
index 0970188..0116256 100644
--- a/application/argumentparser.cpp
+++ b/application/argumentparser.cpp
@@ -288,8 +288,8 @@ ArgumentParser::ArgumentParser() :
  * \remarks
  *  - The parser does not take ownership. Do not destroy the arguments as long as they are used as
  *    main arguments.
- *  - Sets the first specified argument as default argument if none is assigned yet and the
- *    first argument has no mandatory sub arguments.
+ *  - Sets the first specified argument as default argument if none has been assigned yet and the
+ *    first argument does not require any values or has no mandatory sub arguments.
  */
 void ArgumentParser::setMainArguments(const ArgumentInitializerList &mainArguments)
 {
@@ -301,7 +301,7 @@ void ArgumentParser::setMainArguments(const ArgumentInitializerList &mainArgumen
         if(!m_defaultArg) {
             if(!(*mainArguments.begin())->requiredValueCount()) {
                 bool subArgsRequired = false;
-                for(Argument *subArg : (*mainArguments.begin())->subArguments()) {
+                for(const Argument *subArg : (*mainArguments.begin())->subArguments()) {
                     if(subArg->isRequired()) {
                         subArgsRequired = true;
                         break;
diff --git a/tests/testutils.cpp b/tests/testutils.cpp
index 95cb8c6..ffc8bb4 100644
--- a/tests/testutils.cpp
+++ b/tests/testutils.cpp
@@ -221,8 +221,16 @@ string TestApplication::workingCopyPath(const string &name) const
  *  - The specified \a args must be 0 terminated. The first argument is the application name.
  *  - Currently only available under UNIX.
  */
-int TestApplication::execApp(const char *const *args, string &stdout, string &stderr) const
+int TestApplication::execApp(const char *const *args, string &stdout, string &stderr, bool suppressLogging) const
 {
+    // print log message
+    if(!suppressLogging) {
+        cout << '-';
+        for(const char *const *i = args; *i; ++i) {
+            cout << ' ' << *i;
+        }
+        cout << endl;
+    }
     // determine application path
     const char *appPath = m_applicationPathArg.firstValue();
     if(!appPath || !*appPath) {
diff --git a/tests/testutils.h b/tests/testutils.h
index 31a757a..4c4455e 100644
--- a/tests/testutils.h
+++ b/tests/testutils.h
@@ -18,7 +18,7 @@ public:
     std::string testFilePath(const std::string &name) const;
 #ifdef PLATFORM_UNIX
     std::string workingCopyPath(const std::string &name) const;
-    int execApp(const char *const *args, std::string &output, std::string &errors) const;
+    int execApp(const char *const *args, std::string &output, std::string &errors, bool suppressLogging = false) const;
 #endif
     bool unitsSpecified() const;
     const std::vector<const char *> &units() const;