diff --git a/test/index.mjs b/test/index.mjs
index 454982cc..ca92448f 100644
--- a/test/index.mjs
+++ b/test/index.mjs
@@ -50,6 +50,7 @@ import "./tests/operations/HaversineDistance";
 import "./tests/operations/Hexdump";
 import "./tests/operations/Image";
 import "./tests/operations/Jump";
+import "./tests/operations/JSONBeautify";
 import "./tests/operations/JWTDecode";
 import "./tests/operations/JWTSign";
 import "./tests/operations/JWTVerify";
diff --git a/test/tests/operations/JSONBeautify.mjs b/test/tests/operations/JSONBeautify.mjs
new file mode 100644
index 00000000..20d06c05
--- /dev/null
+++ b/test/tests/operations/JSONBeautify.mjs
@@ -0,0 +1,111 @@
+/**
+ * JSONBeautify tests.
+ *
+ * @author Phillip Nordwall [Phillip.Nordwall@gmail.com]
+ *
+ * @copyright Crown Copyright 2017
+ * @license Apache-2.0
+ */
+import TestRegister from "../../TestRegister";
+
+TestRegister.addTests([
+    {
+        name: "JSON Beautify: space, ''",
+        input: "",
+        expectedOutput: "",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: [" "],
+            },
+        ],
+    },
+    {
+        name: "JSON Beautify: space, number",
+        input: "42",
+        expectedOutput: "42",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: [" "],
+            },
+        ],
+    },
+    {
+        name: "JSON Beautify: space, string",
+        input: "\"string\"",
+        expectedOutput: "\"string\"",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: [" "],
+            },
+        ],
+    },
+    {
+        name: "JSON Beautify: space, boolean",
+        input: "false",
+        expectedOutput: "false",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: [" "],
+            },
+        ],
+    },
+    {
+        name: "JSON Beautify: space, emptyList",
+        input: "[]",
+        expectedOutput: "[]",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: [" "],
+            },
+        ],
+    },
+    {
+        name: "JSON Beautify: space, list",
+        input: "[2,1]",
+        expectedOutput: "[\n 2,\n 1\n]",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: [" "],
+            },
+        ],
+    },
+    {
+        name: "JSON Beautify: tab, list",
+        input: "[2,1]",
+        expectedOutput: "[\n\t2,\n\t1\n]",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: ["\t"],
+            },
+        ],
+    },
+    {
+        name: "JSON Beautify: space, object",
+        input: "{\"second\":2,\"first\":3}",
+        expectedOutput: "{\n \"second\": 2,\n \"first\": 3\n}",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: [" "],
+            },
+        ],
+    },
+    {
+        name: "JSON Beautify: tab, nested",
+        input: "[2,{\"second\":2,\"first\":3,\"beginning\":{\"j\":\"3\",\"i\":[2,3,false]}},1,2,3]",
+        expectedOutput: "[\n\t2,\n\t{\n\t\t\"second\": 2,\n\t\t\"first\": 3,\n\t\t\"beginning\": {\n\t\t\t\"j\": \"3\",\n\t\t\t\"i\": [\n\t\t\t\t2,\n\t\t\t\t3,\n\t\t\t\tfalse\n\t\t\t]\n\t\t}\n\t},\n\t1,\n\t2,\n\t3\n]",
+        recipeConfig: [
+            {
+                op: "JSON Beautify",
+                args: ["\t"],
+            },
+        ],
+    },
+]);