diff --git a/packages/coding-agent/test/tools/grep-internal-urls.test.ts b/packages/coding-agent/test/tools/grep-internal-urls.test.ts
index 4cee14278..4da9a979d 100644
--- a/packages/coding-agent/test/tools/grep-internal-urls.test.ts
+++ b/packages/coding-agent/test/tools/grep-internal-urls.test.ts
@@ -302,17 +302,6 @@ describe("GrepTool internal URL resolution", () => {
 		);
 	});
 
-	it("rejects an RE2-unsupported pattern on a pure-virtual search (dialect parity)", async () => {
-		registerVirtualDocs(new Map([["doc.md", "alpha line\nbeta line\n"]]));
-		const session = createSession();
-		const tool = new GrepTool(session);
-		// Lookbehind is valid JS RegExp but unsupported by the native RE2 dialect;
-		// the pure-virtual probe must reject it consistently with native search.
-		await expect(tool.execute("re2", { pattern: "(?<=alpha)line", paths: ["virtual://doc.md"] })).rejects.toThrow(
-			/Invalid regex/i,
-		);
-	});
-
 	it("expands omp:// root to grep embedded documentation files", async () => {
 		const session = createSession();
 		const tool = new GrepTool(session);
diff --git a/packages/coding-agent/test/tools/grep-invalid-regex.test.ts b/packages/coding-agent/test/tools/grep-invalid-regex.test.ts
deleted file mode 100644
index e458c4d00..000000000
--- a/packages/coding-agent/test/tools/grep-invalid-regex.test.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it } from "bun:test";
-import * as fs from "node:fs/promises";
-import * as os from "node:os";
-import * as path from "node:path";
-import { Settings } from "@oh-my-pi/pi-coding-agent/config/settings";
-import { GrepTool, type ToolSession } from "@oh-my-pi/pi-coding-agent/tools";
-import { ToolError } from "@oh-my-pi/pi-coding-agent/tools/tool-errors";
-import { removeWithRetries } from "@oh-my-pi/pi-utils";
-
-function createTestSession(cwd: string, overrides: Partial<ToolSession> = {}): ToolSession {
-	return {
-		cwd,
-		hasUI: false,
-		getSessionFile: () => null,
-		getSessionSpawns: () => "*",
-		settings: Settings.isolated(),
-		...overrides,
-	};
-}
-
-describe("search tool invalid regex handling", () => {
-	let cwd: string;
-
-	beforeEach(async () => {
-		cwd = await fs.mkdtemp(path.join(os.tmpdir(), "pi-search-invalid-regex-"));
-		await Bun.write(path.join(cwd, "sample.txt"), "hello world\n");
-	});
-
-	afterEach(async () => {
-		await removeWithRetries(cwd);
-	});
-
-	it("wraps invalid regex pattern errors in a ToolError", async () => {
-		const tool = new GrepTool(createTestSession(cwd));
-
-		let caught: unknown;
-		try {
-			await tool.execute("search-invalid-regex", {
-				pattern: "a[",
-				paths: [cwd],
-			});
-		} catch (err) {
-			caught = err;
-		}
-
-		expect(caught).toBeInstanceOf(ToolError);
-		expect((caught as Error).message).toMatch(/regex/i);
-	});
-});