diff --git a/integration-tests/src/test/java/org/openmrs/module/fhir2/providers/r4/AllergyIntoleranceFhirResourceProviderIntegrationTest.java b/integration-tests/src/test/java/org/openmrs/module/fhir2/providers/r4/AllergyIntoleranceFhirResourceProviderIntegrationTest.java
index 8f6ca7e4d..da3d81830 100644
--- a/integration-tests/src/test/java/org/openmrs/module/fhir2/providers/r4/AllergyIntoleranceFhirResourceProviderIntegrationTest.java
+++ b/integration-tests/src/test/java/org/openmrs/module/fhir2/providers/r4/AllergyIntoleranceFhirResourceProviderIntegrationTest.java
@@ -45,6 +45,8 @@ public class AllergyIntoleranceFhirResourceProviderIntegrationTest extends BaseF
 	
 	private static final String JSON_PATCH_ALLERGY_PATH = "org/openmrs/module/fhir2/providers/AllergyIntolerance_json_patch.json";
 	
+	private static final String XML_PATCH_ALLERGY_PATH = "org/openmrs/module/fhir2/providers/AllergyIntolerance_xmlpatch.xml";
+	
 	private static final String JSON_CREATE_ALLERGY_DOCUMENT = "org/openmrs/module/fhir2/providers/AllergyIntoleranceWebTest_create.json";
 	
 	private static final String XML_CREATE_ALLERGY_DOCUMENT = "org/openmrs/module/fhir2/providers/AllergyIntoleranceWebTest_create.xml";
@@ -458,6 +460,31 @@ public void shouldPatchExistingAllergyUsingJsonPatch() throws Exception {
 		assertThat(allergyIntolerance, validResource());
 	}
 	
+	@Test
+	public void shouldPatchExistingAllergyUsingXmlPatch() throws Exception {
+		String xmlAllergyPatch;
+		try (InputStream is = this.getClass().getClassLoader().getResourceAsStream(XML_PATCH_ALLERGY_PATH)) {
+			Objects.requireNonNull(is);
+			xmlAllergyPatch = inputStreamToString(is, UTF_8);
+		}
+		
+		MockHttpServletResponse response = patch("/AllergyIntolerance/" + ALLERGY_UUID)
+				.xmlPatch(xmlAllergyPatch).accept(FhirMediaTypes.XML).go();
+		
+		assertThat(response, isOk());
+		assertThat(response.getContentType(), is(FhirMediaTypes.XML.toString()));
+		assertThat(response.getContentAsString(), notNullValue());
+		
+		AllergyIntolerance allergyIntolerance = readResponse(response);
+		
+		assertThat(allergyIntolerance, notNullValue());
+		assertThat(allergyIntolerance.getIdElement().getIdPart(), equalTo(ALLERGY_UUID));
+		
+		//ensure category has been patched
+		assertThat(allergyIntolerance.getCategory().get(0).getCode(), equalTo("food"));
+		assertThat(allergyIntolerance, validResource());
+	}
+	
 	@Test
 	public void shouldDeleteExistingAllergyAsXML() throws Exception {
 		MockHttpServletResponse response = delete("/AllergyIntolerance/" + ALLERGY_UUID).accept(FhirMediaTypes.XML).go();
diff --git a/test-data/src/main/resources/org/openmrs/module/fhir2/providers/AllergyIntolerance_xmlpatch.xml b/test-data/src/main/resources/org/openmrs/module/fhir2/providers/AllergyIntolerance_xmlpatch.xml
new file mode 100644
index 000000000..f4833ba36
--- /dev/null
+++ b/test-data/src/main/resources/org/openmrs/module/fhir2/providers/AllergyIntolerance_xmlpatch.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!--
+    This Source Code Form is subject to the terms of the Mozilla Public License,
+    v. 2.0. If a copy of the MPL was not distributed with this file, You can
+    obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under
+    the terms of the Healthcare Disclaimer located at http://openmrs.org/license.
+    Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS
+    graphic logo is a trademark of OpenMRS Inc.
+-->
+<diff xmlns:fhir="http://hl7.org/fhir">
+	<replace sel="/fhir:AllergyIntolerance/fhir:category/@value">
+		food
+	</replace>
+</diff>