diff --git a/ph-schematron-xslt/src/test/java/com/helger/schematron/supplementary/Issue158Test.java b/ph-schematron-xslt/src/test/java/com/helger/schematron/supplementary/Issue158Test.java
new file mode 100644
index 000000000..30a3f9307
--- /dev/null
+++ b/ph-schematron-xslt/src/test/java/com/helger/schematron/supplementary/Issue158Test.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2014-2023 Philip Helger (www.helger.com)
+ * philip[at]helger[dot]com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.helger.schematron.supplementary;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+import java.io.File;
+
+import javax.annotation.Nonnull;
+
+import org.junit.Test;
+
+import com.helger.commons.collection.impl.ICommonsList;
+import com.helger.commons.io.resource.FileSystemResource;
+import com.helger.schematron.sch.SchematronResourceSCH;
+import com.helger.schematron.svrl.AbstractSVRLMessage;
+import com.helger.schematron.svrl.SVRLHelper;
+import com.helger.schematron.svrl.jaxb.SchematronOutputType;
+
+public final class Issue158Test
+{
+  public static void validateAndProduceSVRL (@Nonnull final File aSchematron, final File aXML) throws Exception
+  {
+    final SchematronResourceSCH aSCH = SchematronResourceSCH.fromFile (aSchematron);
+
+    // Perform validation
+    final SchematronOutputType aSVRL = aSCH.applySchematronValidationToSVRL (new FileSystemResource (aXML));
+    assertNotNull (aSVRL);
+
+    final ICommonsList <AbstractSVRLMessage> aAssertions = SVRLHelper.getAllFailedAssertionsAndSuccessfulReports (aSVRL);
+    assertEquals (2, aAssertions.size ());
+
+    final AbstractSVRLMessage aAssert0 = aAssertions.get (0);
+    assertEquals (2, aAssert0.getDiagnosticReferences ().size ());
+    assertEquals ("d_role_en", aAssert0.getDiagnosticReferences ().get (0).getDiagnostic ());
+  }
+
+  @Test
+  public void testIssue () throws Exception
+  {
+    validateAndProduceSVRL (new File ("src/test/resources/external/issues/github156/schematron.sch"),
+                            new File ("src/test/resources/external/issues/github156/test.xml"));
+  }
+}