diff --git a/mutation-testing/scripts/sed-script.sh b/mutation-testing/scripts/sed-script.sh
new file mode 100644
index 0000000000..b6c05e1c36
--- /dev/null
+++ b/mutation-testing/scripts/sed-script.sh
@@ -0,0 +1,14 @@
+
+FILE="../packages-output/stx-genesis/caught.txt"
+
+var_1="stx-genesis/src/lib.rs"
+var_2="replace <impl Iterator for LinePairReader>::next -> Option<Self::Item> with Some(Default::default())"
+
+# Escape the variables for use in a sed pattern
+escaped_var_1=$(echo "$var_1" | sed -E 's/([][\/$*.^|])/\\&/g')
+escaped_var_2=$(echo "$var_2" | sed -E 's/([][\/$*.^|])/\\&/g')
+
+# Use sed to remove lines matching the pattern
+sed "/$escaped_var_1:[0-9]+:$escaped_var_2/d" "$FILE" > "$FILE"
+# :[0-9]+:
+# sed -i "/$regex/d" "$FILE"