diff --git a/tests/boundary/cli/dylibResolutionCli.test.ts b/tests/boundary/cli/dylibResolutionCli.test.ts
index f6482a2f3..66fa21ba3 100644
--- a/tests/boundary/cli/dylibResolutionCli.test.ts
+++ b/tests/boundary/cli/dylibResolutionCli.test.ts
@@ -477,6 +477,7 @@ cliTest(
   "reports each same-named slice's own embedded dyld environment",
   async ({ cli }) => {
     // arm64e and arm64e.x1 slices both report the architecture name arm64e.
+    // A plain x86_64 slice keeps the bundle openable on x64 hosts.
     for (const [settings, expected] of [
       [[null, "DYLD_PRINT_RPATHS=1"], ["DYLD_PRINT_RPATHS=1"]],
       [
@@ -486,8 +487,8 @@ cliTest(
     ] as const) {
       const app = await fixtureApp();
       await writeFiles(app, {
-        "Contents/MacOS/App": fatImage(
-          [CPU.arm64e, CPU.arm64eX1].map((cpu, index) => {
+        "Contents/MacOS/App": fatImage([
+          ...[CPU.arm64e, CPU.arm64eX1].map((cpu, index) => {
             const setting = settings[index];
             return {
               cpu,
@@ -500,7 +501,8 @@ cliTest(
               }),
             };
           }),
-        ),
+          { cpu: CPU.x86_64, bytes: machoImage({ cpu: CPU.x86_64 }) },
+        ]),
       });
       const result = await cli.run({
         arguments: [
@@ -516,7 +518,9 @@ cliTest(
       const trace = dylibResolutionResultSchema.parse(
         parseEvidence(result.json).normalized_result,
       );
-      expect(trace.roots).toHaveLength(2);
+      expect(
+        trace.roots.filter(({ architecture }) => architecture === "arm64e"),
+      ).toHaveLength(2);
       const environments = trace.findings
         .filter(({ kind }) => kind === "dyld-environment-present")
         .map(({ explanation }) =>