diff --git a/transport/serialbridge/test/serial_unittest.cpp b/transport/serialbridge/test/serial_unittest.cpp
index 3fb0227..a7e2938 100644
--- a/transport/serialbridge/test/serial_unittest.cpp
+++ b/transport/serialbridge/test/serial_unittest.cpp
@@ -18,12 +18,11 @@
 
 TEST(TestSpecialCharact, getUnescapedCharact)
 {
-    uint8_t c;
     auto channel = std::make_shared<SerialChannel>(0);
 
     for (const auto& set : testsets)
     {
-        c = channel->getUnescapedCharacter(set.second);
+        uint8_t c = channel->getUnescapedCharacter(set.second);
         ASSERT_EQ(c, set.first);
     }
 }