diff --git a/test/index.js b/test/index.js
index 773a5b14..9fa4dcdc 100644
--- a/test/index.js
+++ b/test/index.js
@@ -27,6 +27,7 @@ import "./tests/operations/MorseCode.js";
 import "./tests/operations/MS.js";
 import "./tests/operations/StrUtils.js";
 import "./tests/operations/SeqUtils.js";
+import "./tests/operations/PhpSerialization.js";
 
 
 let allTestsPassing = true;
diff --git a/test/tests/operations/PhpSerialization.js b/test/tests/operations/PhpSerialization.js
new file mode 100644
index 00000000..a38379cd
--- /dev/null
+++ b/test/tests/operations/PhpSerialization.js
@@ -0,0 +1,68 @@
+/**
+ * PHP Serialization tests.
+ *
+ * @author Jarmo van Lenthe
+ *
+ * @copyright Crown Copyright 2017
+ * @license BSD-3-Clause
+ */
+
+import TestRegister from "../../TestRegister.js";
+
+TestRegister.addTests([
+    {
+        name: "PHP Deserialize empty array",
+        input: "a:0:{}",
+        expectedOutput: "{}",
+        recipeConfig: [
+            {
+                op: "PHP Deserialize",
+                args: [true],
+            },
+        ],
+    },
+    {
+        name: "PHP Deserialize integer",
+        input: "i:10;",
+        expectedOutput: "10",
+        recipeConfig: [
+            {
+                op: "PHP Deserialize",
+                args: [true],
+            },
+        ],
+    },
+    {
+        name: "PHP Deserialize string",
+        input: "s:17:\"PHP Serialization\";",
+        expectedOutput: "\"PHP Serialization\"",
+        recipeConfig: [
+            {
+                op: "PHP Deserialize",
+                args: [true],
+            },
+        ],
+    },
+    {
+        name: "PHP Deserialize array (JSON)",
+        input: "a:2:{s:1:\"a\";i:10;i:0;a:1:{s:2:\"ab\";b:1;}}",
+        expectedOutput: "{\"a\": 10,\"0\": {\"ab\": true}}",
+        recipeConfig: [
+            {
+                op: "PHP Deserialize",
+                args: [true],
+            },
+        ],
+    },
+    {
+        name: "PHP Deserialize array (non-JSON)",
+        input: "a:2:{s:1:\"a\";i:10;i:0;a:1:{s:2:\"ab\";b:1;}}",
+        expectedOutput: "{\"a\": 10,0: {\"ab\": true}}",
+        recipeConfig: [
+            {
+                op: "PHP Deserialize",
+                args: [false],
+            },
+        ],
+    },
+]);