diff --git a/.github/workflows/swift_package_test.yml b/.github/workflows/swift_package_test.yml
index 357943ef..d3ba7a4e 100644
--- a/.github/workflows/swift_package_test.yml
+++ b/.github/workflows/swift_package_test.yml
@@ -6,7 +6,7 @@ on:
       macos_xcode_versions:
         type: string
         description: "Xcode version list (JSON)"
-        default: "[\"16.2\", \"16.3\"]"
+        default: "[\"16.2\", \"16.3\", \"26.b6\"]"
       macos_exclude_xcode_versions:
         type: string
         description: "Exclude Xcode version list (JSON)"