diff --git a/bot/src/test/java/org/openjdk/skara/bot/BotRunnerConfigurationTests.java b/bot/src/test/java/org/openjdk/skara/bot/BotRunnerConfigurationTests.java
index befd5e705..728205659 100644
--- a/bot/src/test/java/org/openjdk/skara/bot/BotRunnerConfigurationTests.java
+++ b/bot/src/test/java/org/openjdk/skara/bot/BotRunnerConfigurationTests.java
@@ -22,6 +22,7 @@
  */
 package org.openjdk.skara.bot;
 
+import java.nio.file.Path;
 import org.junit.jupiter.api.Test;
 import org.openjdk.skara.json.JSON;
 
@@ -36,6 +37,6 @@ void storageFolder() throws ConfigurationError {
         var cfg = BotRunnerConfiguration.parse(input);
         var botCfg = cfg.perBotConfiguration("xbot");
 
-        assertEquals("/x/xbot", botCfg.storageFolder().toString());
+        assertEquals(Path.of("/x/xbot"), botCfg.storageFolder());
     }
 }
diff --git a/build.gradle b/build.gradle
index bc877ca61..30b9e0512 100644
--- a/build.gradle
+++ b/build.gradle
@@ -48,6 +48,9 @@ configure(subprojects.findAll() { it.name != 'bots' }) {
         testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.3.1'
     }
 
+    compileJava.options.encoding = 'UTF-8'
+    compileTestJava.options.encoding = 'UTF-8'
+
     test {
         useJUnitPlatform()
 
diff --git a/process/src/test/java/org/openjdk/skara/process/ProcessTests.java b/process/src/test/java/org/openjdk/skara/process/ProcessTests.java
index 2e6587598..a41b3eae0 100644
--- a/process/src/test/java/org/openjdk/skara/process/ProcessTests.java
+++ b/process/src/test/java/org/openjdk/skara/process/ProcessTests.java
@@ -23,15 +23,16 @@
 package org.openjdk.skara.process;
 
 import org.junit.jupiter.api.*;
+import org.junit.jupiter.api.condition.*;
 
 import java.io.IOException;
 import java.nio.file.Files;
 import java.time.Duration;
-import java.util.concurrent.TimeoutException;
 import java.util.logging.*;
 
 import static org.junit.jupiter.api.Assertions.*;
 
+@DisabledOnOs(OS.WINDOWS)
 class ProcessTests {
 
     private final static String invalidDirectory = "/askldjfoiuycvbsdf8778";