diff --git a/tests/Testing.h b/tests/Testing.h
index 6da7f4a7..1e70ccdb 100644
--- a/tests/Testing.h
+++ b/tests/Testing.h
@@ -43,6 +43,7 @@ namespace Testing {
         OperationType_CloseViaDockWidgetAPI, ///< Closing programatically via DockWidget::close()
         OperationType_HideViaDockWidgetAPI,  ///< Hidding programatically via DockWidget::hide()
         OperationType_ShowViaDockWidgetAPI,  ///< Hidding programatically via DockWidget::show()
+        OperationType_Count /// Keep at end
     };
 
     ///@brief Describes a testable action.
diff --git a/tests/fuzzer.cpp b/tests/fuzzer.cpp
index 9a85a82a..8bfed57c 100644
--- a/tests/fuzzer.cpp
+++ b/tests/fuzzer.cpp
@@ -119,7 +119,10 @@ public:
     Testing::Operation getRandomOperation()
     {
         Testing::Operation operation;
-        operation.operationType = OperationType_CloseViaDockWidgetAPI; // TODO
+
+        std::uniform_int_distribution<> operationDistrib(OperationType_None + 1, OperationType_Count - 1);
+        operation.operationType = OperationType(operationDistrib(m_randomEngine));
+
         return operation;
     }