diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 1aee326b..ee016700 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -23,8 +23,21 @@ jobs:
         os:
           - ubuntu-latest
           - macOS-latest
+          - windows-latest
         arch:
           - x64
+          - x86
+        exclude:
+          - os: macOS-latest
+            arch: x86
+          - os: ubuntu-latest
+            arch: x86
+          - os: windows-latest
+            arch: x64
+          - os: windows-latest
+            version: 1.8
+          - os: windows-latest
+            version: 1.11
     steps:
       - uses: actions/checkout@v3.5.0
       - uses: julia-actions/setup-julia@v1
diff --git a/src/macros.jl b/src/macros.jl
index fdaeb925..d992e565 100644
--- a/src/macros.jl
+++ b/src/macros.jl
@@ -112,7 +112,7 @@ those test in their own module.
 Should only be created via the `@testitem` macro.
 """
 struct TestItem
-    number::Base.RefValue{Int64} # populated by runtests coordinator once all test items are known
+    number::Base.RefValue{Int} # populated by runtests coordinator once all test items are known
     name::String
     id::String # in case file/name isn't a sufficiently stable identifier for reporting purposes
     tags::Vector{Symbol}