diff --git a/test/__snapshots__/prefix/bump-phpunit.sh b/test/__snapshots__/prefix/bump-phpunit.sh
new file mode 100644
index 0000000..ab12652
--- /dev/null
+++ b/test/__snapshots__/prefix/bump-phpunit.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# This script is a part of the ideasonpurpose/docker-phpunit-watch project
+# https://github.com/ideasonpurpose/docker-phpunit-watch
+#
+# Version: 1.6.18
+#
+# For now, manually update the PHPUnit version in phpunit-version.json before running
+#
+# This script does a few things:
+# - Updates the PHPUnit version in Dockerfile
+# - Updates the PHPUnit version in README.md
+#
+# The phpunit-version.json file should be commited to Git. The push-to-dockerhub
+# GitHub Action uses this file to generate tag names for the Docker Image.
+
+# style helpers
+RESET="\033[0m"
+BOLD="\033[1m"
+RED="\033[31m"
+GREEN="\033[32m"
+GOLD="\033[33m"
+BLUE="\033[34m"
+MAGENTA="\033[35m"
+CYAN="\033[36m"
+
+PHPUNIT_LATEST=$(jq -r '.phpunit' /app/phpunit-version.json)
+
+echo -e "✏️   Updating ${GOLD}Dockerfile${RESET} to ${CYAN}phpunit-${PHPUNIT_LATEST}.phar${RESET}"
+sed -i "s/phpunit.de\/phpunit-.*phar/phpunit.de\/phpunit-${PHPUNIT_LATEST}.phar/" /app/Dockerfile
+
+echo -e "✏️   Updating ${GOLD}README.md${RESET} to ${CYAN}v${PHPUNIT_LATEST}${RESET}"
+sed -E -i "s/^<\!-- PHPUNIT_VERSION -->- PHPUnit.+$/<\!-- PHPUNIT_VERSION -->- PHPUnit ${PHPUNIT_LATEST}/" /app/README.md
diff --git a/test/snapshots.test.js b/test/snapshots.test.js
index 05c99a3..a550491 100644
--- a/test/snapshots.test.js
+++ b/test/snapshots.test.js
@@ -24,6 +24,7 @@ describe("Snapshot Tests:", () => {
   const newVersion = "1.414.213";
 
   testFiles.forEach((file) => {
+    // console.log(file);
     test(path.basename(file), () => {
       const src = fs.readFileSync(file).toString();
 
@@ -39,3 +40,19 @@ describe("Snapshot Tests:", () => {
     });
   });
 });
+
+describe("Shell script re-wrapping with prefix", () => {
+  const newVersion = "1.6.18";
+
+  /**
+   * This is testing a problem discovered with https://github.com/ideasonpurpose/docker-phpunit-watch
+   * where the bump-phpunit.sh script was being re-wrapped when the version was updated.
+   */
+  test("re-wrapped shell script", async () => {
+    const result = await updateFile("./test/snapshots/prefix/bump-phpunit.sh", newVersion, {dryRun: true, prefixes: ['hello']});
+    console.log(result);
+    expect(result?.data).toMatchFileSnapshot(
+      "./__snapshots__/prefix/bump-phpunit.sh"
+    );
+  });
+});
diff --git a/test/snapshots/prefix/bump-phpunit.sh b/test/snapshots/prefix/bump-phpunit.sh
new file mode 100644
index 0000000..c22e8b2
--- /dev/null
+++ b/test/snapshots/prefix/bump-phpunit.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# This script is a part of the ideasonpurpose/docker-phpunit-watch project
+# https://github.com/ideasonpurpose/docker-phpunit-watch
+#
+# Version: 0.9.4
+#
+# For now, manually update the PHPUnit version in phpunit-version.json before running
+#
+# This script does a few things:
+# - Updates the PHPUnit version in Dockerfile
+# - Updates the PHPUnit version in README.md
+#
+# The phpunit-version.json file should be commited to Git. The push-to-dockerhub
+# GitHub Action uses this file to generate tag names for the Docker Image.
+
+# style helpers
+RESET="\033[0m"
+BOLD="\033[1m"
+RED="\033[31m"
+GREEN="\033[32m"
+GOLD="\033[33m"
+BLUE="\033[34m"
+MAGENTA="\033[35m"
+CYAN="\033[36m"
+
+PHPUNIT_LATEST=$(jq -r '.phpunit' /app/phpunit-version.json)
+
+echo -e "✏️   Updating ${GOLD}Dockerfile${RESET} to ${CYAN}phpunit-${PHPUNIT_LATEST}.phar${RESET}"
+sed -i "s/phpunit.de\/phpunit-.*phar/phpunit.de\/phpunit-${PHPUNIT_LATEST}.phar/" /app/Dockerfile
+
+echo -e "✏️   Updating ${GOLD}README.md${RESET} to ${CYAN}v${PHPUNIT_LATEST}${RESET}"
+sed -E -i "s/^<\!-- PHPUNIT_VERSION -->- PHPUnit.+$/<\!-- PHPUNIT_VERSION -->- PHPUnit ${PHPUNIT_LATEST}/" /app/README.md