diff --git a/sqllogictest/src/substitution.rs b/sqllogictest/src/substitution.rs
index 57b05e1..7353620 100644
--- a/sqllogictest/src/substitution.rs
+++ b/sqllogictest/src/substitution.rs
@@ -22,7 +22,7 @@ impl Substitution {
                 .replace("$__TEST_DIR__", &self.test_dir())
                 .replace("$__NOW__", &self.now()))
         } else {
-            subst::substitute(&input, self).map_err(SubstError)
+            subst::substitute(input, self).map_err(SubstError)
         }
     }
 
diff --git a/tests/system_command/system_command.slt b/tests/system_command/system_command.slt
index 161c5ef..fae1a11 100644
--- a/tests/system_command/system_command.slt
+++ b/tests/system_command/system_command.slt
@@ -1,7 +1,7 @@
 control substitution on
 
 system ok
-echo 114514 > ${__TEST_DIR__}/test.txt
+echo 114514 > $__TEST_DIR__/test.txt
 
 query T
 select read("${__TEST_DIR__}/test.txt")
@@ -23,10 +23,9 @@ echo "114514"
 114514
 
 
-# Note: when substitution is on, we need to escape the backslash
 # Note: 1 blank line in the middle is ok, but not 2
 system ok
-echo "114\\n\\n514"
+echo "114\n\n514"
 ----
 114