diff --git a/ext/net/02_tls.js b/ext/net/02_tls.js
index 4216cbe22b..b77b92e263 100644
--- a/ext/net/02_tls.js
+++ b/ext/net/02_tls.js
@@ -153,6 +153,13 @@ function loadTlsKeyPair(api, {
   keyFile,
   privateKey,
 }) {
+  if (internals.future) {
+    certFile = undefined;
+    certChain = undefined;
+    keyFile = undefined;
+    privateKey = undefined;
+  }
+
   // Check for "pem" format
   if (keyFormat !== undefined && keyFormat !== "pem") {
     throw new TypeError('If `keyFormat` is specified, it must be "pem"');
diff --git a/tests/specs/future/runtime_api/main.js b/tests/specs/future/runtime_api/main.js
index a79185e925..b44291218f 100644
--- a/tests/specs/future/runtime_api/main.js
+++ b/tests/specs/future/runtime_api/main.js
@@ -92,6 +92,19 @@ try {
   }
 }
 
+// Note: this could throw with a `Deno.errors.NotFound` error if `keyFile` and
+// `certFile` were used.
+try {
+  Deno.listenTls({ port: tlsPort, keyFile: "foo", certFile: "foo" });
+} catch (error) {
+  if (
+    error instanceof Deno.errors.InvalidData &&
+    error.message ===
+      "Deno.listenTls requires a key: Error creating TLS certificate"
+  ) {
+    console.log("Deno.ListenTlsOptions.(keyFile|certFile) do nothing");
+  }
+}
 console.log("Deno.customInspect is", Deno.customInspect);
 
 self.close();
diff --git a/tests/specs/future/runtime_api/main.out b/tests/specs/future/runtime_api/main.out
index 1bc41c026e..07b5884950 100644
--- a/tests/specs/future/runtime_api/main.out
+++ b/tests/specs/future/runtime_api/main.out
@@ -34,4 +34,5 @@ Deno.TlsListener.prototype.rid is undefined
 Deno.TlsConn.prototype.rid is undefined
 Deno.FsWatcher.prototype.rid is undefined
 Deno.FsFile constructor is illegal
+Deno.ListenTlsOptions.(keyFile|certFile) do nothing
 Deno.customInspect is undefined