diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 324d191f..6f9f7e47 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         java: [ '21' ]
-        os: [ 'ubuntu-latest' ]
+        os: [ 'ubuntu-latest', 'windows-latest', 'macos-latest' ]
 
     runs-on: ${{ matrix.os }}
 
diff --git a/praxiscore-hub-net/src/test/java/org/praxislive/hub/net/FileServerTest.java b/praxiscore-hub-net/src/test/java/org/praxislive/hub/net/FileServerTest.java
index f5d3e328..92c73731 100644
--- a/praxiscore-hub-net/src/test/java/org/praxislive/hub/net/FileServerTest.java
+++ b/praxiscore-hub-net/src/test/java/org/praxislive/hub/net/FileServerTest.java
@@ -39,7 +39,7 @@ public class FileServerTest {
 
     @Test
     public void testFileServer() throws IOException {
-        var rootDir = Files.createTempDirectory("px-fileserver-test");
+        var rootDir = Files.createTempDirectory("px-fileserver-test").toRealPath();
         var allowedDir = Files.createDirectory(rootDir.resolve("allowed"));
         var allowedFile = Files.writeString(allowedDir.resolve("allowed-text.txt"),
                 "ALLOWED", StandardOpenOption.CREATE_NEW);