diff --git a/tests/manchester_encoder_decoder_test.cpp b/tests/manchester_encoder_decoder_test.cpp
index bcbf7de8f34d99f3bd4357e18bc4668cc858cde3..9dba870241d6362e0f3409b69014f405dc360715 100644
--- a/tests/manchester_encoder_decoder_test.cpp
+++ b/tests/manchester_encoder_decoder_test.cpp
@@ -55,10 +55,10 @@ int main() {
 
     // additional test cases of every byte
     printf("IN -> MANCHESTER CODE -> OUT\n");
+    ManchesterEncoder encoder;
+    ManchesterDecoder decoder;
     uint8_t b = 0x00u;
     do {
-        ManchesterEncoder encoder;
-        ManchesterDecoder decoder;
         printf("%02x -> ", b);
         encoder.input(b);
         for (uint8_t i = 0; i < 16; i++) {