diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1cb09a2eb..2e8e9e646 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,6 +34,11 @@ if(NOT GPROF)
         set(GPROF NO)
 endif()
 
+#CONDITIONAL FLAG to turn on TESTING_MODE
+if(NOT TESTING_MODE)
+        set(TESTING_MODE YES)
+endif()
+
 #Creates the Graphitti project with the correct languages, depending on if using GPU or not
 #If using CUDA, also verify the CUDA package and set the required CUDA variables
 if(ENABLE_CUDA)	
@@ -72,6 +77,11 @@ if(GPROF)
         set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -pg")
 endif()
 
+if(TESTING_MODE)
+        message("-- Setting TESTING_MODE: ON")
+        add_definitions(-DTESTING_MODE)
+endif()
+
 #HDF5 Support, finds HDF5 package for C and C++ and links the hdf5 libraries to the executable     \
 #                  later in the file.
 find_package(HDF5 COMPONENTS C CXX)
diff --git a/Simulator/Core/Graphitti_Main.cpp b/Simulator/Core/Graphitti_Main.cpp
index 318e0a664..bf8bdb1f3 100644
--- a/Simulator/Core/Graphitti_Main.cpp
+++ b/Simulator/Core/Graphitti_Main.cpp
@@ -35,6 +35,10 @@ using namespace std;
 ///  @return -1 if error, else 0 if success.
 int main(int argc, char *argv[])
 {
+#ifdef TESTING_MODE
+   cout << "Testing mode is ON \n";
+#endif
+
    // Clear logging files at the start of each simulation
    fstream("Output/Debug/logging.txt", ios::out | ios::trunc);
    fstream("Output/Debug/vertices.txt", ios::out | ios::trunc);