diff --git a/fetch/content-encoding/gzip-body.any.js b/fetch/content-encoding/gzip-body.any.js
new file mode 100644
index 00000000000000..37758b7d91775f
--- /dev/null
+++ b/fetch/content-encoding/gzip-body.any.js
@@ -0,0 +1,16 @@
+// META: global=window,worker
+
+const expectedDecompressedSize = 10500;
+[
+    "text",
+    "octetstream"
+].forEach(contentType => {
+    promise_test(async t => {
+        let response = await fetch(`resources/foo.${contentType}.gz`);
+        assert_true(response.ok);
+        let arrayBuffer = await response.arrayBuffer()
+        let u8 = new Uint8Array(arrayBuffer);
+        assert_equals(u8.length, expectedDecompressedSize);
+    }, `fetched gzip data with content type ${contentType} should be decompressed.`);
+});
+
diff --git a/fetch/content-encoding/resources/foo.octetstream.gz b/fetch/content-encoding/resources/foo.octetstream.gz
new file mode 100644
index 00000000000000..f3df4cb89b5d0b
Binary files /dev/null and b/fetch/content-encoding/resources/foo.octetstream.gz differ
diff --git a/fetch/content-encoding/resources/foo.octetstream.gz.headers b/fetch/content-encoding/resources/foo.octetstream.gz.headers
new file mode 100644
index 00000000000000..27d4f401f1b601
--- /dev/null
+++ b/fetch/content-encoding/resources/foo.octetstream.gz.headers
@@ -0,0 +1,2 @@
+Content-type: application/octet-stream
+Content-Encoding: gzip
diff --git a/fetch/content-encoding/resources/foo.text.gz b/fetch/content-encoding/resources/foo.text.gz
new file mode 100644
index 00000000000000..05a5cce07b5143
Binary files /dev/null and b/fetch/content-encoding/resources/foo.text.gz differ
diff --git a/fetch/content-encoding/resources/foo.text.gz.headers b/fetch/content-encoding/resources/foo.text.gz.headers
new file mode 100644
index 00000000000000..7def3ddc148d1c
--- /dev/null
+++ b/fetch/content-encoding/resources/foo.text.gz.headers
@@ -0,0 +1,2 @@
+Content-type: text/plain
+Content-Encoding: gzip