diff --git a/build_test/scripts/decode.sh b/build_test/scripts/decode.sh
index 2b99842..8724ddd 100755
--- a/build_test/scripts/decode.sh
+++ b/build_test/scripts/decode.sh
@@ -9,8 +9,8 @@
 cd $TEST_DATA_DIRECTORY
 gnuradio-companion --version
 
-$RUNLINE | tail -n +2 >  grgsm_decode_test1_result
-diff grgsm_decode_test1_result $TEST_CONTROL_DIRECTORY/grgsm_decode_test1_expected > /dev/null
+$RUNLINE | tail -n +2 | tee grgsm_decode_test1_result
+diff grgsm_decode_test1_result $TEST_CONTROL_DIRECTORY/grgsm_decode_test1_expected
 TEST_RESULT=$?
 
 rm grgsm_decode_test1_result