diff --git a/__tests__/distributors/base-installer.test.ts b/__tests__/distributors/base-installer.test.ts
index 344f16cd..44ec50bb 100644
--- a/__tests__/distributors/base-installer.test.ts
+++ b/__tests__/distributors/base-installer.test.ts
@@ -257,7 +257,7 @@ describe('setupJava', () => {
     expect(spyCoreAddPath).toHaveBeenCalled();
     expect(spyCoreExportVariable).toHaveBeenCalled();
     expect(spyCoreExportVariable).toHaveBeenCalledWith(
-      `JAVA_HOME_${input.version}_${input.architecture.toLocaleUpperCase()}`,
+      `JAVA_HOME_${input.version}_${(input.architecture || 'x86').toLocaleUpperCase()}`,
       expected.path
     );
     expect(spyCoreSetOutput).toHaveBeenCalled();