diff --git a/docs/articles/guides/console-args.md b/docs/articles/guides/console-args.md
index 6fc5ddb245..49255071da 100644
--- a/docs/articles/guides/console-args.md
+++ b/docs/articles/guides/console-args.md
@@ -243,6 +243,6 @@ dotnet run -c Release -- --filter * --runtimes netcoreapp2.0 netcoreapp2.1 --sta
 * `--runOncePerIteration` run the benchmark exactly once per iteration.
 * `--buildTimeout` build timeout in seconds.
 * `--wasmEngine` full path to a java script engine used to run the benchmarks, used by Wasm toolchain.
-* `--wasmMainJS` path to the test-main.js file used by Wasm toolchain. Mandatory when using \"--runtimes wasm\"
+* `--wasmMainJS` path to the test-main.mjs file used by Wasm toolchain. Mandatory when using \"--runtimes wasm\"
 * `--expose_wasm` arguments for the JavaScript engine used by Wasm toolchain.
 * `--customRuntimePack` specify the path to a custom runtime pack. Only used for wasm currently.
diff --git a/src/BenchmarkDotNet/Toolchains/MonoWasm/WasmExecutor.cs b/src/BenchmarkDotNet/Toolchains/MonoWasm/WasmExecutor.cs
index 7e857ff364..a6a395e3d3 100644
--- a/src/BenchmarkDotNet/Toolchains/MonoWasm/WasmExecutor.cs
+++ b/src/BenchmarkDotNet/Toolchains/MonoWasm/WasmExecutor.cs
@@ -55,7 +55,7 @@ private static ExecuteResult Execute(BenchmarkCase benchmarkCase, BenchmarkId be
         private static Process CreateProcess(BenchmarkCase benchmarkCase, ArtifactsPaths artifactsPaths, string args, IResolver resolver)
         {
             WasmRuntime runtime = (WasmRuntime)benchmarkCase.GetRuntime();
-            string mainJs = runtime.RuntimeMoniker < RuntimeMoniker.WasmNet70 ? "main.js" : "test-main.js";
+            string mainJs = runtime.RuntimeMoniker < RuntimeMoniker.WasmNet70 ? "main.js" : "test-main.mjs";
 
             var start = new ProcessStartInfo
             {
diff --git a/src/BenchmarkDotNet/Toolchains/MonoWasm/WasmGenerator.cs b/src/BenchmarkDotNet/Toolchains/MonoWasm/WasmGenerator.cs
index 7c9aa8826f..1f4a9a92cd 100644
--- a/src/BenchmarkDotNet/Toolchains/MonoWasm/WasmGenerator.cs
+++ b/src/BenchmarkDotNet/Toolchains/MonoWasm/WasmGenerator.cs
@@ -21,7 +21,7 @@ public WasmGenerator(string targetFrameworkMoniker, string cliPath, string packa
         {
             Aot = aot;
             CustomRuntimePack = customRuntimePack;
-            MainJS = (targetFrameworkMoniker == "net5.0" || targetFrameworkMoniker == "net6.0") ? "main.js" : "test-main.js";
+            MainJS = (targetFrameworkMoniker == "net5.0" || targetFrameworkMoniker == "net6.0") ? "main.js" : "test-main.mjs";
         }
 
         protected override void GenerateProject(BuildPartition buildPartition, ArtifactsPaths artifactsPaths, ILogger logger)
diff --git a/tests/BenchmarkDotNet.IntegrationTests/AppBundle/test-main.js b/tests/BenchmarkDotNet.IntegrationTests/AppBundle/test-main.mjs
similarity index 100%
rename from tests/BenchmarkDotNet.IntegrationTests/AppBundle/test-main.js
rename to tests/BenchmarkDotNet.IntegrationTests/AppBundle/test-main.mjs
diff --git a/tests/BenchmarkDotNet.IntegrationTests/WasmTests.cs b/tests/BenchmarkDotNet.IntegrationTests/WasmTests.cs
index 6d3519a9c5..ef670e3b62 100644
--- a/tests/BenchmarkDotNet.IntegrationTests/WasmTests.cs
+++ b/tests/BenchmarkDotNet.IntegrationTests/WasmTests.cs
@@ -29,7 +29,7 @@ public void WasmIsSupported()
             var dotnetVersion = "net8.0";
             var logger = new OutputLogger(Output);
             var netCoreAppSettings = new NetCoreAppSettings(dotnetVersion, null, "Wasm");
-            var mainJsPath = Path.Combine(AppContext.BaseDirectory, "AppBundle", "test-main.js");
+            var mainJsPath = Path.Combine(AppContext.BaseDirectory, "AppBundle", "test-main.mjs");
 
             var config = ManualConfig.CreateEmpty()
                 .AddLogger(logger)