diff --git a/pom.xml b/pom.xml
index 1795f8c..6ef6f52 100644
--- a/pom.xml
+++ b/pom.xml
@@ -235,6 +235,14 @@
                     </excludes>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>3.0.0-M5</version>
+                    <configuration>
+                        <includes>**/*.java</includes>
+                    </configuration>
+             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
@@ -286,6 +294,7 @@
                         <configuration>
                             <argLine>-Djna.library.path=${bloscJnaLibraryPath}</argLine>
                             <systemPropertiesFile>${basedir}/blosc.properties</systemPropertiesFile>
+                            <includes>**/*.java</includes>
                         </configuration>
                     </plugin>
                 </plugins>
diff --git a/src/main/java/com/bc/zarr/ZarrArray.java b/src/main/java/com/bc/zarr/ZarrArray.java
index 569637c..ab113c7 100644
--- a/src/main/java/com/bc/zarr/ZarrArray.java
+++ b/src/main/java/com/bc/zarr/ZarrArray.java
@@ -210,6 +210,10 @@ public ByteOrder getByteOrder() {
         return _byteOrder;
     }
 
+    public DimensionSeparator getDimensionSeparator() {
+        return _separator;
+    }
+
     public void write(Number value) throws IOException, InvalidRangeException {
         final int[] shape = getShape();
         final int[] offset = new int[shape.length];
diff --git a/src/test/java/com/bc/zarr/ZarrArrayTest_dimensionSeparator.java b/src/test/java/com/bc/zarr/ZarrArrayTest_dimensionSeparator.java
index d5c9526..f620c9b 100644
--- a/src/test/java/com/bc/zarr/ZarrArrayTest_dimensionSeparator.java
+++ b/src/test/java/com/bc/zarr/ZarrArrayTest_dimensionSeparator.java
@@ -91,11 +91,8 @@ public void tearDown() throws Exception {
     @Test
     public void openOldStyleZarrArrayAndDetectDimensionSeparator() throws IOException, NoSuchFieldException, IllegalAccessException {
         final ZarrArray array = ZarrArray.open(arrayPath);
-        final Object separator = TestUtils.getPrivateFieldObject(array, "_separator");
-        assertThat(separator)
-                .isNotNull()
-                .isInstanceOf(DimensionSeparator.class);
-        DimensionSeparator sep = (DimensionSeparator) separator;
+        DimensionSeparator sep = array.getDimensionSeparator();
+        assertThat(sep).isNotNull();
         assertThat(sep.getSeparatorChar()).isEqualTo("/");
     }
 
@@ -104,4 +101,4 @@ private void prepareOldStyleArrayHeaderFile(FileSystemStore store) throws IOExce
         final OutputStream os = store.getOutputStream(".zarray");
         TestUtils.deleteLineContaining("dimension_separator", is, os);
     }
-}
\ No newline at end of file
+}