diff --git a/Tests/LibWeb/Text/expected/Streams/ReadableStream-pipeTo-cannot-pipe-locked-stream.txt b/Tests/LibWeb/Text/expected/Streams/ReadableStream-pipeTo-cannot-pipe-locked-stream.txt
new file mode 100644
index 00000000000..62e0b47e95f
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/Streams/ReadableStream-pipeTo-cannot-pipe-locked-stream.txt
@@ -0,0 +1 @@
+TypeError: Failed to execute 'pipeTo' on 'ReadableStream': Cannot pipe a locked stream
diff --git a/Tests/LibWeb/Text/expected/Streams/ReadableStream-pipeTo-cannot-pipe-to-locked-stream.txt b/Tests/LibWeb/Text/expected/Streams/ReadableStream-pipeTo-cannot-pipe-to-locked-stream.txt
new file mode 100644
index 00000000000..41b0c0e441f
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/Streams/ReadableStream-pipeTo-cannot-pipe-to-locked-stream.txt
@@ -0,0 +1 @@
+TypeError: Failed to execute 'pipeTo' on 'ReadableStream':  Cannot pipe to a locked stream
diff --git a/Tests/LibWeb/Text/input/Streams/ReadableStream-pipeTo-cannot-pipe-locked-stream.html b/Tests/LibWeb/Text/input/Streams/ReadableStream-pipeTo-cannot-pipe-locked-stream.html
new file mode 100644
index 00000000000..6621ef1724f
--- /dev/null
+++ b/Tests/LibWeb/Text/input/Streams/ReadableStream-pipeTo-cannot-pipe-locked-stream.html
@@ -0,0 +1,22 @@
+<script src="../include.js"></script>
+<script>
+    asyncTest(done => {
+        const writableStream = new WritableStream(
+            {
+                write(chunk) {}
+            }
+        );
+        const stream = new ReadableStream({
+            start(controller) {},
+            pull(controller) {},
+            cancel() {},
+        });
+
+        stream.getReader();
+        stream.pipeTo(writableStream)
+            .catch(reason => {
+                println(reason);
+                done();
+            });
+    });
+</script>
diff --git a/Tests/LibWeb/Text/input/Streams/ReadableStream-pipeTo-cannot-pipe-to-locked-stream.html b/Tests/LibWeb/Text/input/Streams/ReadableStream-pipeTo-cannot-pipe-to-locked-stream.html
new file mode 100644
index 00000000000..5b5a9374ed4
--- /dev/null
+++ b/Tests/LibWeb/Text/input/Streams/ReadableStream-pipeTo-cannot-pipe-to-locked-stream.html
@@ -0,0 +1,22 @@
+<script src="../include.js"></script>
+<script>
+    asyncTest(done => {
+        const writableStream = new WritableStream(
+            {
+                write(chunk) {}
+            }
+        );
+        const stream = new ReadableStream({
+            start(controller) {},
+            pull(controller) {},
+            cancel() {},
+        });
+
+        writableStream.getWriter();
+        stream.pipeTo(writableStream)
+            .catch(reason => {
+                println(reason);
+                done();
+            });
+    });
+</script>