diff --git a/source/core/constants.ts b/source/core/constants.ts
index bbf43106..088ff58d 100644
--- a/source/core/constants.ts
+++ b/source/core/constants.ts
@@ -58,3 +58,20 @@ export const kyOptionKeys: KyOptionsRegistry = {
 	onDownloadProgress: true,
 	fetch: true,
 };
+
+export const requestOptions = new Set([
+	'options',
+	'method',
+	'headers',
+	'body',
+	'mode',
+	'credentials',
+	'cache',
+	'redirect',
+	'referrer',
+	'referrerPolicy',
+	'integrity',
+	'keepalive',
+	'signal',
+	'priority',
+]);
diff --git a/source/utils/options.ts b/source/utils/options.ts
index 22c11d0a..95ae52cc 100644
--- a/source/utils/options.ts
+++ b/source/utils/options.ts
@@ -1,4 +1,4 @@
-import {kyOptionKeys} from '../core/constants.js';
+import {kyOptionKeys, requestOptions} from '../core/constants.js';
 
 export const findUnknownOptions = (
 	request: Request,
@@ -7,7 +7,7 @@ export const findUnknownOptions = (
 	const unknownOptions: Record<string, unknown> = {};
 
 	for (const key in options) {
-		if (!(key in kyOptionKeys) && !(key in request)) {
+		if (!requestOptions.has(key) && !(key in kyOptionKeys) && !(key in request)) {
 			unknownOptions[key] = options[key];
 		}
 	}