diff --git a/checker/checker.sh b/checker/checker.sh
index 12d97bb9a00a2b634dbbf4f08a32ec20167cab4b..9cc7b534dc8a2a91c0b107bf89193800f843b2dc 100755
--- a/checker/checker.sh
+++ b/checker/checker.sh
@@ -10,7 +10,7 @@ test_err()
     local temp_output=''
     temp_output="$(mktemp)"
 
-    timeout "$TIMEOUT_DURATION" bash -c "$EXECUTABLE {} > $temp_output 2>&1"
+    timeout "$TIMEOUT_DURATION" bash -c "$EXECUTABLE > $temp_output 2>&1"
 
     diff -Zq "$temp_output" "./references/ref1" > /dev/null 2>&1
     return $?