diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 458a3b4c4..65a32f3b4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,23 +6,56 @@ on:
       - main
   pull_request:
     branches:
-      - '*'
+      - "*"
 
 jobs:
   build:
-    name: MacOS
-    runs-on: macOS-latest
+    strategy:
+      matrix:
+        xcode:
+          - "11.7"   # Swift 5.2
+          - "12.4"   # Swift 5.3
+          - "12.5.1" # Swift 5.4
+          - "13.0"   # Swift 5.5
+
+    name: macOS 11, Xcode ${{ matrix.xcode }}
+    runs-on: macos-11
     steps:
-    - uses: actions/checkout@v1
-    - name: Select Xcode 12.4
-      run: sudo xcode-select -s /Applications/Xcode_12.4.app
-    - name: Run tests
-      run: make test-swift
+      - uses: actions/checkout@v1
+      - name: Select Xcode ${{ matrix.xcode }}
+        run: sudo xcode-select -s /Applications/Xcode_${{ matrix.xcode }}.app
+      - name: Run tests
+        run: make test-swift
 
   ubuntu:
-    name: Ubuntu
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: ["18.04", "20.04"]
+
+    name: Ubuntu ${{ matrix.os }}
+    runs-on: ubuntu-${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v1
+      - name: Run tests
+        run: make test-linux
+
+  windows:
+    strategy:
+      matrix:
+        swift:
+          - "5.4"
+          - "5.5"
+
+    name: Windows 2019, Swift ${{ matrix.swift }}
+    runs-on: windows-2019
+
     steps:
-    - uses: actions/checkout@v1
-    - name: Run tests
-      run: make test-linux
+      - name: Set git to use LF
+        run: |
+          git config --global core.autocrlf false
+          git config --global core.eol lf
+      - uses: actions/checkout@v2
+      - uses: MaxDesiatov/swift-windows-action@v1
+        with:
+          shell-action: swift test
+          swift-version: ${{ matrix.swift }}
diff --git a/Sources/SnapshotTesting/AssertInlineSnapshot.swift b/Sources/SnapshotTesting/AssertInlineSnapshot.swift
index 434cbfd13..403196471 100644
--- a/Sources/SnapshotTesting/AssertInlineSnapshot.swift
+++ b/Sources/SnapshotTesting/AssertInlineSnapshot.swift
@@ -147,7 +147,7 @@ public func _verifyInlineSnapshot<Value>(
 
       /// Did not successfully record, so we will fail.
       if !attachments.isEmpty {
-        #if !os(Linux)
+        #if !os(Linux) && !os(Windows)
         if ProcessInfo.processInfo.environment.keys.contains("__XCODE_BUILT_PRODUCTS_DIR_PATHS") {
           XCTContext.runActivity(named: "Attached Failure Diff") { activity in
             attachments.forEach {
diff --git a/Sources/SnapshotTesting/AssertSnapshot.swift b/Sources/SnapshotTesting/AssertSnapshot.swift
index 7065ec7f1..90d80af80 100644
--- a/Sources/SnapshotTesting/AssertSnapshot.swift
+++ b/Sources/SnapshotTesting/AssertSnapshot.swift
@@ -275,7 +275,7 @@ public func verifySnapshot<Value, Format>(
       try snapshotting.diffing.toData(diffable).write(to: failedSnapshotFileUrl)
 
       if !attachments.isEmpty {
-        #if !os(Linux)
+        #if !os(Linux) && !os(Windows)
         if ProcessInfo.processInfo.environment.keys.contains("__XCODE_BUILT_PRODUCTS_DIR_PATHS") {
           XCTContext.runActivity(named: "Attached Failure Diff") { activity in
             attachments.forEach {
diff --git a/Sources/SnapshotTesting/Common/XCTAttachment.swift b/Sources/SnapshotTesting/Common/XCTAttachment.swift
index 312d8bcb0..8d5f17f64 100644
--- a/Sources/SnapshotTesting/Common/XCTAttachment.swift
+++ b/Sources/SnapshotTesting/Common/XCTAttachment.swift
@@ -1,4 +1,4 @@
-#if os(Linux)
+#if os(Linux) || os(Windows)
 import Foundation
 
 public struct XCTAttachment {
diff --git a/Sources/SnapshotTesting/Snapshotting/URLRequest.swift b/Sources/SnapshotTesting/Snapshotting/URLRequest.swift
index c72f7527a..1f97d4003 100644
--- a/Sources/SnapshotTesting/Snapshotting/URLRequest.swift
+++ b/Sources/SnapshotTesting/Snapshotting/URLRequest.swift
@@ -65,10 +65,10 @@ extension Snapshotting where Value == URLRequest, Format == String {
     if let httpBodyData = request.httpBody, let httpBody = String(data: httpBodyData, encoding: .utf8) {
       var escapedBody = httpBody.replacingOccurrences(of: "\\\"", with: "\\\\\"")
       escapedBody = escapedBody.replacingOccurrences(of: "\"", with: "\\\"")
-      
+
       components.append("--data \"\(escapedBody)\"")
     }
-    
+
     // Cookies
     if let cookie = request.allHTTPHeaderFields?["Cookie"] {
       let escapedValue = cookie.replacingOccurrences(of: "\"", with: "\\\"")
diff --git a/Tests/SnapshotTestingTests/SnapshotTestingTests.swift b/Tests/SnapshotTestingTests/SnapshotTestingTests.swift
index 7eb169751..a4134c0fe 100644
--- a/Tests/SnapshotTestingTests/SnapshotTestingTests.swift
+++ b/Tests/SnapshotTestingTests/SnapshotTestingTests.swift
@@ -1210,7 +1210,7 @@ private let allContentSizes =
     ]
 #endif
 
-#if os(Linux)
+#if os(Linux) || os(Windows)
 extension SnapshotTestingTests {
   static var allTests : [(String, (SnapshotTestingTests) -> () throws -> Void)] {
     return [