diff --git a/crates/cli/src/bin/wasm-bindgen-test-runner/deno.rs b/crates/cli/src/bin/wasm-bindgen-test-runner/deno.rs
index 019eb6f9123..ee6232943cc 100644
--- a/crates/cli/src/bin/wasm-bindgen-test-runner/deno.rs
+++ b/crates/cli/src/bin/wasm-bindgen-test-runner/deno.rs
@@ -1,13 +1,10 @@
-use std::fs;
 use std::path::Path;
 use std::process::Command;
+use std::{fs, process};
 
 use anyhow::{Context, Error};
 
-use crate::{
-    node::{exec, SHARED_SETUP},
-    Cli,
-};
+use crate::{node::SHARED_SETUP, Cli};
 
 pub fn execute(module: &str, tmpdir: &Path, cli: Cli, tests: &[String]) -> Result<(), Error> {
     let mut js_to_execute = format!(
@@ -60,10 +57,15 @@ if (!ok) Deno.exit(1);"#,
             .arg(&js_path)
             .args(args),
     )*/
-    exec(
-        Command::new("deno")
-            .arg("run")
-            .arg("--allow-read")
-            .arg(&js_path),
-    )
+    let status = Command::new("deno")
+        .arg("run")
+        .arg("--allow-read")
+        .arg(&js_path)
+        .status()?;
+
+    if !status.success() {
+        process::exit(status.code().unwrap_or(1))
+    } else {
+        Ok(())
+    }
 }
diff --git a/crates/cli/src/bin/wasm-bindgen-test-runner/node.rs b/crates/cli/src/bin/wasm-bindgen-test-runner/node.rs
index 68249ad7da9..303583e7f2c 100644
--- a/crates/cli/src/bin/wasm-bindgen-test-runner/node.rs
+++ b/crates/cli/src/bin/wasm-bindgen-test-runner/node.rs
@@ -1,6 +1,7 @@
 use std::env;
 use std::fs;
 use std::path::{Path, PathBuf};
+use std::process;
 use std::process::Command;
 
 use anyhow::{Context, Error};
@@ -138,27 +139,17 @@ pub fn execute(
         .map(|s| s.to_string())
         .filter(|s| !s.is_empty())
         .collect::<Vec<_>>();
-    exec(
-        Command::new("node")
-            .env("NODE_PATH", env::join_paths(&path).unwrap())
-            .arg("--expose-gc")
-            .args(&extra_node_args)
-            .arg(&js_path),
-    )
-}
 
-#[cfg(unix)]
-pub fn exec(cmd: &mut Command) -> Result<(), Error> {
-    use std::os::unix::prelude::*;
-    Err(Error::from(cmd.exec()).context(format!(
-        "failed to execute `{}`",
-        cmd.get_program().to_string_lossy()
-    )))
-}
+    let status = Command::new("node")
+        .env("NODE_PATH", env::join_paths(&path).unwrap())
+        .arg("--expose-gc")
+        .args(&extra_node_args)
+        .arg(&js_path)
+        .status()?;
 
-#[cfg(windows)]
-pub fn exec(cmd: &mut Command) -> Result<(), Error> {
-    use std::process;
-    let status = cmd.status()?;
-    process::exit(status.code().unwrap_or(3));
+    if !status.success() {
+        process::exit(status.code().unwrap_or(1))
+    } else {
+        Ok(())
+    }
 }