diff --git a/scripts/lib/clean-linux-hopper-runtime.d.mts b/scripts/lib/clean-linux-hopper-runtime.d.mts
index dd1010aa1e..d2177fad47 100644
--- a/scripts/lib/clean-linux-hopper-runtime.d.mts
+++ b/scripts/lib/clean-linux-hopper-runtime.d.mts
@@ -1,3 +1,4 @@
 export function assertCleanLinuxHopperRuntime(
   launcherPaths?: readonly string[],
+  procRoot?: string,
 ): Promise<void>;
diff --git a/scripts/lib/clean-linux-hopper-runtime.mjs b/scripts/lib/clean-linux-hopper-runtime.mjs
index 27a306fce1..fbe15e0d3a 100644
--- a/scripts/lib/clean-linux-hopper-runtime.mjs
+++ b/scripts/lib/clean-linux-hopper-runtime.mjs
@@ -16,6 +16,7 @@ export const assertCleanLinuxHopperRuntime = async (
       ? []
       : [process.env.HOPPER_LAUNCHER_PATH]),
   ],
+  procRoot = "/proc",
 ) => {
   const { stdout } = await execFileAsync("ps", ["-ax", "-o", "command="]);
   if (/\/opt\/hopper\/bin\/Hopper|\bXvfb\b|hopper-demo-x11\.py/u.test(stdout))
@@ -32,17 +33,17 @@ export const assertCleanLinuxHopperRuntime = async (
   // /proc exposes the executed file even when argv[0] names a removed symlink.
   // Compare file identity, not a display path or a process name.
   let inspectionError;
-  for (const entry of await readdir("/proc", { withFileTypes: true })) {
+  for (const entry of await readdir(procRoot, { withFileTypes: true })) {
     if (!entry.isDirectory() || !/^\d+$/u.test(entry.name)) continue;
     let executable;
     try {
-      executable = await stat(`/proc/${entry.name}/exe`, { bigint: true });
+      executable = await stat(`${procRoot}/${entry.name}/exe`, { bigint: true });
     } catch (error) {
       if (error?.code === "ENOENT" || error?.code === "ESRCH") continue;
       // Other users' executables may be unreadable. The setup lane launches
       // providers as the caller; unreadable caller-owned processes fail closed.
       if (error?.code === "EACCES") {
-        const owner = await stat(`/proc/${entry.name}`).catch((cause) => {
+        const owner = await stat(`${procRoot}/${entry.name}`).catch((cause) => {
           if (cause?.code === "ENOENT") return undefined;
           throw cause;
         });
diff --git a/src/domain/android/androidAnalysis.ts b/src/domain/android/androidAnalysis.ts
index c1ec76ba83..caa3bf5ee0 100644
--- a/src/domain/android/androidAnalysis.ts
+++ b/src/domain/android/androidAnalysis.ts
@@ -102,7 +102,7 @@ const textCoverage = z.strictObject({
 export const dexDescriptorSchema = z
   .string()
   .regex(
-    /^\((?:\[*(?:[ZBSCIJFD]|L[^;()]+;))*\)(?:V|\[*(?:[ZBSCIJFD]|L[^;()]+;))$/u,
+    /^\((?:\[*(?:[ZBSCIJFD]|L[^;\x28\x29]+;))*\)(?:V|\[*(?:[ZBSCIJFD]|L[^;\x28\x29]+;))$/u,
   );
 
 const method = z.strictObject({
diff --git a/tests/process-global/cleanLinuxHopperRuntime.test.ts b/tests/process-global/cleanLinuxHopperRuntime.test.ts
index f6b9fc677b..8b7be17da6 100644
--- a/tests/process-global/cleanLinuxHopperRuntime.test.ts
+++ b/tests/process-global/cleanLinuxHopperRuntime.test.ts
@@ -1,6 +1,13 @@
 import { execFile } from "node:child_process";
 import { randomUUID } from "node:crypto";
-import { chmod, copyFile, readFile, symlink, unlink } from "node:fs/promises";
+import {
+  chmod,
+  copyFile,
+  mkdir,
+  readFile,
+  symlink,
+  unlink,
+} from "node:fs/promises";
 import { join } from "node:path";
 import { promisify } from "node:util";
 
@@ -24,6 +31,8 @@ it
     const directory = await createTestTempDirectory("rea-clean-runtime-test-");
     const launcher = join(directory, "Hopper");
     const alternate = join(directory, "Hopper-alternate");
+    const procRoot = join(directory, "proc");
+    await mkdir(procRoot);
     const alternateMode = mode === "alternate launcher";
     if (alternateMode) {
       await copyFile("/usr/bin/sleep", launcher);
@@ -32,7 +41,10 @@ it
     }
     // A rejection must come from the fixture we are about to launch. An
     // existing Xvfb would otherwise mask a broken executable-identity check.
-    await assertCleanLinuxHopperRuntime(alternateMode ? [launcher] : []);
+    await assertCleanLinuxHopperRuntime(
+      alternateMode ? [launcher] : [],
+      procRoot,
+    );
     const command = alternateMode ? alternate : process.execPath;
     const arguments_ = alternateMode ? ["30"] : ["-e", childCode];
     const parentCode = `
@@ -59,6 +71,11 @@ it
       const { stdout } = await parent;
       const { pid } = JSON.parse(stdout) as { pid: number };
       orphanPid = pid;
+      if (alternateMode) {
+        const processEntry = join(procRoot, String(pid));
+        await mkdir(processEntry);
+        await symlink(`/proc/${String(pid)}/exe`, join(processEntry, "exe"));
+      }
       const { stdout: coordinates } = await execFileAsync("ps", [
         "-p",
         String(pid),
@@ -92,7 +109,10 @@ it
         await unlink(alternate);
       }
       await expect(
-        assertCleanLinuxHopperRuntime(alternateMode ? [launcher] : []),
+        assertCleanLinuxHopperRuntime(
+          alternateMode ? [launcher] : [],
+          procRoot,
+        ),
       ).rejects.toThrow("Clean Linux runner retained a Hopper demo process");
       // Observation must not terminate the fixture, even though it resembles Xvfb.
       const { stdout: alive } = await execFileAsync("ps", [