diff --git a/config_test.cpp b/config_test.cpp
index 66994061..008423b1 100644
--- a/config_test.cpp
+++ b/config_test.cpp
@@ -70,6 +70,14 @@ int main()
 
   // compilers
 
+#   ifdef __COMO__
+        cout << "__COMO__ defined as " << __COMO__ << "\n";
+#   endif
+
+#   ifdef __COMO_VERSION__
+        cout << "__COMO_VERSION__ defined as " << __COMO_VERSION__ << "\n";
+#   endif
+
 #   ifdef __GNUC__
         cout << "__GNUC__ defined as " << __GNUC__ << "\n";
 #   endif
@@ -78,6 +86,10 @@ int main()
         cout << "__GNUC_MINOR__ defined as " << __GNUC_MINOR__ << "\n";
 #   endif
 
+#   ifdef __EDG__
+        cout << "__EDG__ defined as " << __EDG__ << "\n";
+#   endif
+
 #   ifdef __EDG_VERSION__
         cout << "__EDG_VERSION__ defined as " << __EDG_VERSION__ << "\n";
 #   endif