diff --git a/tests/operations/index.mjs b/tests/operations/index.mjs
index 8d3cd623..ac99cdb6 100644
--- a/tests/operations/index.mjs
+++ b/tests/operations/index.mjs
@@ -101,6 +101,7 @@ import "./tests/LuhnChecksum.mjs";
 import "./tests/CipherSaber2.mjs";
 import "./tests/Colossus.mjs";
 import "./tests/ParseObjectIDTimestamp.mjs";
+import "./tests/XMLValidator.mjs";
 
 
 // Cannot test operations that use the File type yet
diff --git a/tests/operations/tests/XMLValidator.mjs b/tests/operations/tests/XMLValidator.mjs
new file mode 100644
index 00000000..e3c2466f
--- /dev/null
+++ b/tests/operations/tests/XMLValidator.mjs
@@ -0,0 +1,32 @@
+/**
+ * @author n1073645 [n1073645@gmail.com]
+ * @copyright Crown Copyright 2020
+ * @license Apache-2.0
+ */
+
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    {
+        name: "XML Validator, valid XML",
+        input: "<bookstore><book category=\"WEB\"><title lang=\"en\">Learning XML</title><author>Erik T. Ray</author><year>2003</year><price>39.95</price></book></bookstore>",
+        expectedOutput: "<bookstore><book category=\"WEB\"><title lang=\"en\">Learning XML</title><author>Erik T. Ray</author><year>2003</year><price>39.95</price></book></bookstore>",
+        recipeConfig: [
+            {
+                op: "XML Validator",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "XML Validator, invalid XML",
+        input: "<bookstore><book category=\"WE><title lang=\"en\">Learning XML</title><author>Erik T. Ray</author><year>2003</year><price>39.95</price></book></bookstore>",
+        expectedOutput: "Error: [xmldom error]	element parse error: Error: [xmldom warning]	attribute space is required\"category\"!!\n@#[line:undefined,col:undefined]\n@#[line:undefined,col:undefined]",
+        recipeConfig: [
+            {
+                op: "XML Validator",
+                args: [],
+            },
+        ],
+    },
+]);