test: fix tests of other packages

types/node/stream/consumers.d.ts

@@ -1,5 +1,16 @@
-// Reference required types from the default lib:
-/// <reference lib="dom" />
+// Duplicates of interface in lib.dom.ts.
+// Duplicated here rather than referencing lib.dom.ts because doing so causes lib.dom.ts to be loaded for "test-all"
+// Which in turn causes tests to pass that shouldn't pass.
+//
+// This interface is not, and should not be, exported.
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+    stream(): NodeJS.ReadableStream;
+    text(): Promise<string>;
+}
 
 declare module 'stream/consumers' {
     import { Readable } from 'node:stream';