diff --git a/tests/boundary/cli/doctorHopperDiscovery.test.ts b/tests/boundary/cli/doctorHopperDiscovery.test.ts
index a637f73914..0e7fdeacb9 100644
--- a/tests/boundary/cli/doctorHopperDiscovery.test.ts
+++ b/tests/boundary/cli/doctorHopperDiscovery.test.ts
@@ -1,5 +1,5 @@
-import { access, chmod, mkdir, writeFile } from "node:fs/promises";
-import { join } from "node:path";
+import { access, chmod, mkdir, readFile, writeFile } from "node:fs/promises";
+import { delimiter, join } from "node:path";
 
 import { expect } from "vitest";
 
@@ -18,11 +18,35 @@ cliTest.skipIf(!["darwin", "linux"].includes(process.platform))(
       '#!/bin/sh\nprintf launched > "$REA_HOPPER_TEST_MARKER"\nexit 99\n',
     );
     await chmod(launcher, 0o700);
+    const loaderMarker = join(home, "loader-checked-launcher");
+    if (process.platform === "linux") {
+      // A shell fixture needs controlled loader diagnostics on Linux. This
+      // checks discovery and path preservation, not actual Hopper compatibility.
+      const loader = join(home, "bin", "ldd");
+      await writeFile(
+        loader,
+        [
+          "#!/bin/sh",
+          'test "$#" -eq 1 || exit 87',
+          'test "$1" = "$HOPPER_LAUNCHER_PATH" || exit 88',
+          'printf "%s" "$1" > "$REA_HOPPER_LDD_TEST_MARKER"',
+          'printf "%s\\n" "libc.so.6 => /fixture/libc.so.6 (0x1)"',
+          "",
+        ].join("\n"),
+      );
+      await chmod(loader, 0o700);
+    }
 
     const result = await cli.run({
       arguments: ["doctor", "--provider", "hopper", "--json"],
       cwd: home,
       environment: {
+        ...(process.platform === "linux"
+          ? {
+              PATH: [join(home, "bin"), process.env.PATH ?? ""].join(delimiter),
+              REA_HOPPER_LDD_TEST_MARKER: loaderMarker,
+            }
+          : {}),
         HOME: home,
         USERPROFILE: home,
         HOPPER_LAUNCHER_PATH: launcher,
@@ -55,5 +79,7 @@ cliTest.skipIf(!["darwin", "linux"].includes(process.platform))(
     await expect(access(launchMarker)).rejects.toMatchObject({
       code: "ENOENT",
     });
+    if (process.platform === "linux")
+      expect(await readFile(loaderMarker, "utf8")).toBe(launcher);
   },
 );
diff --git a/tests/boundary/providers/RizinDebugSessionCoverage.part2.test.ts b/tests/boundary/providers/RizinDebugSessionCoverage.part2.test.ts
index 13b6c6dcf1..ba63901845 100644
--- a/tests/boundary/providers/RizinDebugSessionCoverage.part2.test.ts
+++ b/tests/boundary/providers/RizinDebugSessionCoverage.part2.test.ts
@@ -19,7 +19,8 @@ it.skipIf(process.platform === "win32")(
   "stops the session when the provider closes its stdin pipe",
   async () => {
     const provider = await makeProvider(
-      'printf "\\000"; exec 0<&-; while :; do :; done',
+      // Readiness must guarantee that the child's stdin is already closed.
+      'exec 0<&-; printf "\\000"; while :; do :; done',
       "#!/bin/sh",
     );
     const { manager, sessionId } = await start(provider, {