diff --git a/crates/cli/src/bin/wasm-bindgen-test-runner/index-headless.html b/crates/cli/src/bin/wasm-bindgen-test-runner/index-headless.html
index c7eed7bb..d671a205 100644
--- a/crates/cli/src/bin/wasm-bindgen-test-runner/index-headless.html
+++ b/crates/cli/src/bin/wasm-bindgen-test-runner/index-headless.html
@@ -19,17 +19,17 @@
           logs.innerHTML += `${msg}\n`;
         }
       };
-      console.log = function() {
+      console.log = function(...args) {
         if (window.console_log_redirect)
-          window.console_log_redirect(orig_console_log, arguments);
+          window.console_log_redirect(orig_console_log, args);
         else
-          orig_console_log.apply(this, arguments);
+          orig_console_log.apply(this, args);
       };
-      console.error = function() {
+      console.error = function(...args) {
         if (window.console_error_redirect)
-          window.console_error_redirect(orig_console_error, arguments);
+          window.console_error_redirect(orig_console_error, args);
         else
-          orig_console_error.apply(this, arguments);
+          orig_console_error.apply(this, args);
       };
       window.__wbg_test_invoke = f => f();
     </script>
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 537b0481..d94d8e92 100644
--- a/crates/cli/src/bin/wasm-bindgen-test-runner/node.rs
+++ b/crates/cli/src/bin/wasm-bindgen-test-runner/node.rs
@@ -23,19 +23,19 @@ pub fn execute(
         // ensure they're bound correctly in wasm. This'll allow us to intercept
         // all these calls and capture the output of tests
         const prev_log = console.log;
-        console.log = function() {{
+        console.log = function(...args) {{
             if (console_log_redirect === null)  {{
-                prev_log.apply(null, arguments);
+                prev_log.apply(null, args);
             }} else {{
-                console_log_redirect(prev_log, arguments);
+                console_log_redirect(prev_log, args);
             }}
         }};
         const prev_error = console.error;
-        console.error = function() {{
+        console.error = function(...args) {{
             if (console_error_redirect === null) {{
-                prev_error.apply(null, arguments);
+                prev_error.apply(null, args);
             }} else {{
-                console_error_redirect(prev_error, arguments);
+                console_error_redirect(prev_error, args);
             }}
         }};