diff --git a/test/input_stream_ops.cpp b/test/input_stream_ops.cpp
index dfa7b2b..8f6aedc 100644
--- a/test/input_stream_ops.cpp
+++ b/test/input_stream_ops.cpp
@@ -19,10 +19,14 @@ TEST_START()
         ss >> c;
         assert(c == Countdown::NONE, "failed to parse enum all lowercase");
 
+        c = Countdown::NORMAL;
+
         ss = std::stringstream("nOnE");
         ss >> c;
         assert(c == Countdown::NONE, "failed to parse enum mixed case #1");
 
+        c = Countdown::NORMAL;
+
         ss = std::stringstream("NoNe");
         ss >> c;
         assert(c == Countdown::NONE, "failed to parse enum mixed case #2");