diff --git a/test/versionTests/entry5.js b/test/versionTests/entry5.js
new file mode 100644
index 0000000..470d57b
--- /dev/null
+++ b/test/versionTests/entry5.js
@@ -0,0 +1,6 @@
+import { mount } from "svelte";
+import Test from "./index.svelte";
+
+mount(Test, {
+    target: document.body,
+});
\ No newline at end of file
diff --git a/test/versionTests/test.js b/test/versionTests/test.js
index 0c7e0e9..2a5d4b3 100644
--- a/test/versionTests/test.js
+++ b/test/versionTests/test.js
@@ -13,7 +13,7 @@ if (!fs.existsSync("./dist/")) {
 //build the application
 esbuild
     .build({
-        entryPoints: ["./entry.js"],
+        entryPoints: [Number(svelteVersion.at(0)) >= 5 ? "./entry5.js" : "./entry.js"],
         mainFields: ["svelte", "browser", "module", "main"],
         conditions: ["svelte", "browser"],
         target: "es2016",
@@ -23,7 +23,7 @@ esbuild
         minify: false, //so the resulting code is easier to understand
         bundle: true,
         splitting: true,
-        sourcemap: "inline",
+        sourcemap: "external",
         plugins: [sveltePlugin()],
     })
     .then((results) => {
diff --git a/test/versionTests/versionTests.sh b/test/versionTests/versionTests.sh
index f0fb465..bae7fd1 100755
--- a/test/versionTests/versionTests.sh
+++ b/test/versionTests/versionTests.sh
@@ -11,7 +11,7 @@ cp ../../dist/index.js .
 npm init -y || exit
 
 # array of versions
-ESBUILD_VERSIONS=("0.9.6" "0.16.17" "0.18.10" "0.19.2")
+ESBUILD_VERSIONS=("0.9.6" "0.16.17" "0.18.10" "0.19.2" "0.21.3")
 SVELTE_VERSIONS=("3.43.0" "3.59.2" "4.0.0" "5.0.0-next.127")
 
 # loop through versions