diff --git a/src/isolate.rs b/src/isolate.rs
index 8e78f770b5..99e3670f24 100644
--- a/src/isolate.rs
+++ b/src/isolate.rs
@@ -197,7 +197,14 @@ impl Isolate {
     }
   }
 
-  pub fn execute(
+  /// Same as execute2() but the filename defaults to "<anonymous>".
+  pub fn execute(&self, js_source: &str) -> Result<(), JSError> {
+    self.execute2("<anonymous>", js_source)
+  }
+
+  /// Executes the provided JavaScript source code. The js_filename argument is
+  /// provided only for debugging purposes.
+  pub fn execute2(
     &self,
     js_filename: &str,
     js_source: &str,
@@ -396,7 +403,6 @@ mod tests {
     tokio_util::init(|| {
       isolate
         .execute(
-          "y.js",
           r#"
           const m = new Uint8Array([4, 5, 6]);
           let n = libdeno.send(m);
@@ -448,7 +454,6 @@ mod tests {
 
       isolate
         .execute(
-          "y.js",
           r#"
           const control = new Uint8Array([4, 5, 6]);
           const data = new Uint8Array([42, 43, 44, 45, 46]);
@@ -485,7 +490,6 @@ mod tests {
 
       isolate
         .execute(
-          "y.js",
           r#"
           const control = new Uint8Array([4, 5, 6]);
           const data = new Uint8Array([42, 43, 44, 45, 46]);
diff --git a/src/main.rs b/src/main.rs
index bcc18511c2..f8888feea8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -109,7 +109,7 @@ fn main() {
   let isolate = isolate::Isolate::new(snapshot, state, ops::dispatch);
   tokio_util::init(|| {
     isolate
-      .execute("deno_main.js", "denoMain();")
+      .execute("denoMain();")
       .unwrap_or_else(print_err_and_exit);
     isolate.event_loop().unwrap_or_else(print_err_and_exit);
   });
diff --git a/tests/async_error.ts.out b/tests/async_error.ts.out
index dd844f9a91..8d276c7396 100644
--- a/tests/async_error.ts.out
+++ b/tests/async_error.ts.out
@@ -7,4 +7,4 @@ Error: error
     at _gatherDependencies ([WILDCARD]/js/runner.ts:[WILDCARD])
     at run ([WILDCARD]/js/runner.ts:[WILDCARD])
     at denoMain ([WILDCARD]/js/main.ts:[WILDCARD])
-    at deno_main.js:1:1
+    at <anonymous>:1:1
diff --git a/tests/error_001.ts.out b/tests/error_001.ts.out
index b9ad7938ca..b015c60982 100644
--- a/tests/error_001.ts.out
+++ b/tests/error_001.ts.out
@@ -5,4 +5,4 @@
     at _gatherDependencies ([WILDCARD]/js/runner.ts:[WILDCARD])
     at run ([WILDCARD]/js/runner.ts:[WILDCARD])
     at denoMain ([WILDCARD]/js/main.ts:[WILDCARD])
-    at deno_main.js:1:1
+    at <anonymous>:1:1
diff --git a/tests/error_002.ts.out b/tests/error_002.ts.out
index 6ea4ede781..a7511b82c6 100644
--- a/tests/error_002.ts.out
+++ b/tests/error_002.ts.out
@@ -5,4 +5,4 @@
     at _drainRunQueue ([WILDCARD]/js/runner.ts:[WILDCARD])
     at run ([WILDCARD]/js/runner.ts:[WILDCARD])
     at denoMain ([WILDCARD]/js/main.ts:[WILDCARD])
-    at deno_main.js:1:1
+    at <anonymous>:1:1