diff --git a/src/test/java/org/codejive/properties/TestProperties.java b/src/test/java/org/codejive/properties/TestProperties.java
index 6bb42a3..a792f28 100644
--- a/src/test/java/org/codejive/properties/TestProperties.java
+++ b/src/test/java/org/codejive/properties/TestProperties.java
@@ -4,6 +4,7 @@
 
 import java.io.*;
 import java.net.URISyntaxException;
+import java.nio.charset.StandardCharsets;
 import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -1126,6 +1127,6 @@ private Path getResource(String name) throws URISyntaxException {
     }
 
     private String readAll(Path f) throws IOException {
-        return new String(Files.readAllBytes(f));
+        return new String(Files.readAllBytes(f), StandardCharsets.UTF_8);
     }
 }