diff --git a/tests/operations/index.mjs b/tests/operations/index.mjs
index 420d0129..f40d840e 100644
--- a/tests/operations/index.mjs
+++ b/tests/operations/index.mjs
@@ -145,6 +145,7 @@ import "./tests/RAKE.mjs";
 import "./tests/Regex.mjs";
 import "./tests/Register.mjs";
 import "./tests/RegularExpression.mjs";
+import "./tests/RenderMarkdown.mjs";
 import "./tests/RisonEncodeDecode.mjs";
 import "./tests/Rotate.mjs";
 import "./tests/RSA.mjs";
diff --git a/tests/operations/tests/RenderMarkdown.mjs b/tests/operations/tests/RenderMarkdown.mjs
new file mode 100644
index 00000000..47781e5e
--- /dev/null
+++ b/tests/operations/tests/RenderMarkdown.mjs
@@ -0,0 +1,110 @@
+/**
+ * RenderMarkdown tests.
+ *
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    {
+        name: "Render Markdown: Nothing",
+        input: "",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"></div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": []
+            }
+        ]
+    },
+    {
+        name: "Render Markdown: Basic Text",
+        input: "Hello World!",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"><p>Hello World!</p>\n</div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": []
+            }
+        ]
+    },
+    {
+        name: "Render Markdown: Simple Markdown",
+        input: "# Hello World!",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"><h1>Hello World!</h1>\n</div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": []
+            }
+        ]
+    },
+    {
+        name: "Render Markdown: URL (not expanded)",
+        input: "https://gchq.github.io/CyberChef/",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"><p>https://gchq.github.io/CyberChef/</p>\n</div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": [false, false, false]
+            }
+        ]
+    },
+    {
+        name: "Render Markdown: URL (expanded)",
+        input: "https://gchq.github.io/CyberChef/",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"><p><a href="https://gchq.github.io/CyberChef/">https://gchq.github.io/CyberChef/</a></p>\n</div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": [true, false, false]
+            }
+        ]
+    },
+    {
+        name: "Render Markdown: Link (not expanded)",
+        input: "[CyberChef](https://gchq.github.io/CyberChef/)",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"><p><a href="https://gchq.github.io/CyberChef/">CyberChef</a></p>\n</div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": [false, false, false]
+            }
+        ]
+    },
+    {
+        name: "Render Markdown: Link (expanded)",
+        input: "[CyberChef](https://gchq.github.io/CyberChef/)",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"><p><a href="https://gchq.github.io/CyberChef/">CyberChef</a></p>\n</div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": [true, false, false]
+            }
+        ]
+    },
+    {
+        name: "Render Markdown: Link (open in new window)",
+        input: "[CyberChef](https://gchq.github.io/CyberChef/)",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"><p><a href="https://gchq.github.io/CyberChef/" target="_blank">CyberChef</a></p>\n</div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": [true, false, true]
+            }
+        ]
+    },
+    {
+        name: "Render Markdown: URL (open in new window)",
+        input: "https://gchq.github.io/CyberChef/",
+        expectedOutput: '<div style="font-family: var(--primary-font-family)"><p><a href="https://gchq.github.io/CyberChef/" target="_blank">https://gchq.github.io/CyberChef/</a></p>\n</div>',
+        recipeConfig: [
+            {
+                "op": "Render Markdown",
+                "args": [true, false, true]
+            }
+        ]
+    },
+]);