diff --git a/src/core/operations/RemoveDiacritics.mjs b/src/core/operations/RemoveDiacritics.mjs
index dd8143758..859d86d78 100644
--- a/src/core/operations/RemoveDiacritics.mjs
+++ b/src/core/operations/RemoveDiacritics.mjs
@@ -19,7 +19,7 @@ class RemoveDiacritics extends Operation {
 
         this.name = "Remove Diacritics";
         this.module = "Default";
-        this.description = "Replaces accented characters with their latin character equivalent.";
+        this.description = "Replaces accented characters with their latin character equivalent. Accented characters are made up of Unicode combining characters, so unicode text formatting such as strikethroughs and underlines will also be removed.";
         this.infoURL = "https://wikipedia.org/wiki/Diacritic";
         this.inputType = "string";
         this.outputType = "string";
diff --git a/src/core/operations/UnicodeTextFormat.mjs b/src/core/operations/UnicodeTextFormat.mjs
index 44d17afee..b1fc474bb 100644
--- a/src/core/operations/UnicodeTextFormat.mjs
+++ b/src/core/operations/UnicodeTextFormat.mjs
@@ -46,7 +46,6 @@ class UnicodeTextFormat extends Operation {
     run(input, args) {
         const [underline, strikethrough] = args;
         let output = input.map(char => [char]);
-        console.dir(output);
         if (strikethrough) {
             output = output.map(charFormat => {
                 charFormat.push(...Utils.strToUtf8ByteArray("\u0336"));
@@ -59,8 +58,8 @@ class UnicodeTextFormat extends Operation {
                 return charFormat;
             });
         }
-        console.dir(output);
-        return output.flat();
+        // return output.flat(); - Not supported in Node 10, polyfilled
+        return [].concat(...output);
     }
 
 }
diff --git a/tests/operations/index.mjs b/tests/operations/index.mjs
index 8d3cd623d..079912565 100644
--- a/tests/operations/index.mjs
+++ b/tests/operations/index.mjs
@@ -69,7 +69,6 @@ import "./tests/ParseQRCode.mjs";
 import "./tests/PowerSet.mjs";
 import "./tests/Regex.mjs";
 import "./tests/Register.mjs";
-import "./tests/RemoveDiacritics.mjs";
 import "./tests/Rotate.mjs";
 import "./tests/SeqUtils.mjs";
 import "./tests/SetDifference.mjs";
@@ -101,6 +100,7 @@ import "./tests/LuhnChecksum.mjs";
 import "./tests/CipherSaber2.mjs";
 import "./tests/Colossus.mjs";
 import "./tests/ParseObjectIDTimestamp.mjs";
+import "./tests/Unicode.mjs";
 
 
 // Cannot test operations that use the File type yet
diff --git a/tests/operations/tests/RemoveDiacritics.mjs b/tests/operations/tests/RemoveDiacritics.mjs
deleted file mode 100644
index c58a2ba60..000000000
--- a/tests/operations/tests/RemoveDiacritics.mjs
+++ /dev/null
@@ -1,22 +0,0 @@
-/**
- * Remove Diacritics tests.
- *
- * @author Klaxon [klaxon@veyr.com]
- * @copyright Crown Copyright 2017
- * @license Apache-2.0
- */
-import TestRegister from "../../lib/TestRegister.mjs";
-
-TestRegister.addTests([
-    {
-        name: "Remove Diacritics",
-        input: "\xe0, \xe8, \xec, \xf2, \xf9  \xc0, \xc8, \xcc, \xd2, \xd9\n\xe1, \xe9, \xed, \xf3, \xfa, \xfd \xc1, \xc9, \xcd, \xd3, \xda, \xdd\n\xe2, \xea, \xee, \xf4, \xfb \xc2, \xca, \xce, \xd4, \xdb\n\xe3, \xf1, \xf5 \xc3, \xd1, \xd5\n\xe4, \xeb, \xef, \xf6, \xfc, \xff \xc4, \xcb, \xcf, \xd6, \xdc, \u0178\n\xe5, \xc5",
-        expectedOutput: "a, e, i, o, u  A, E, I, O, U\na, e, i, o, u, y A, E, I, O, U, Y\na, e, i, o, u A, E, I, O, U\na, n, o A, N, O\na, e, i, o, u, y A, E, I, O, U, Y\na, A",
-        recipeConfig: [
-            {
-                "op": "Remove Diacritics",
-                "args": []
-            },
-        ],
-    },
-]);
diff --git a/tests/operations/tests/Unicode.mjs b/tests/operations/tests/Unicode.mjs
new file mode 100644
index 000000000..2603768f6
--- /dev/null
+++ b/tests/operations/tests/Unicode.mjs
@@ -0,0 +1,83 @@
+/**
+ * Unicode operation tests.
+ *
+ * @author Matt C [me@mitt.dev]
+ * @author Klaxon [klaxon@veyr.com]
+ *
+ * @copyright Crown Copyright 2020
+ * @license Apache-2.0
+ */
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    {
+        name: "Unicode Text Format: underline",
+        input: "a",
+        expectedOutput: "a\u0332",
+        recipeConfig: [
+            {
+                "op": "Unicode Text Format",
+                "args": [true, false],
+            }
+        ],
+    },
+    {
+        name: "Unicode Text Format: strikethrough",
+        input: "a",
+        expectedOutput: "a\u0336",
+        recipeConfig: [
+            {
+                "op": "Unicode Text Format",
+                "args": [false, true],
+            }
+        ],
+    },
+    {
+        name: "Unicode Text Format: both",
+        input: "a",
+        expectedOutput: "a\u0336\u0332",
+        recipeConfig: [
+            {
+                "op": "Unicode Text Format",
+                "args": [true, true],
+            }
+        ],
+    },
+    {
+        name: "Remove Diacritics: text formatting",
+        input: "a",
+        expectedOutput: "a",
+        recipeConfig: [
+            {
+                "op": "Unicode Text Format",
+                "args": [true, true],
+            },
+            {
+                "op": "Remove Diacritics",
+                "args": []
+            }
+        ],
+    },
+    {
+        name: "Remove Diacritics: all diacritical marks one char",
+        input: "à̴̵̶̷̸̡̢̧̨̛̖̗̘̙̜̝̞̟̠̣̤̥̦̩̪̫̬̭̮̯̰̱̲̳̹̺̻̼́̂̃̄̅̆̇̈̉̊̋̌̍̎̏̐̑̒̓̔̽̾̿̀́͂̓̈́̕̚͠͡ͅ", // sorry about this line lol
+        expectedOutput: "a",
+        recipeConfig: [
+            {
+                "op": "Remove Diacritics",
+                "args": []
+            }
+        ],
+    },
+    {
+        name: "Remove Diacritics: default",
+        input: "\xe0, \xe8, \xec, \xf2, \xf9  \xc0, \xc8, \xcc, \xd2, \xd9\n\xe1, \xe9, \xed, \xf3, \xfa, \xfd \xc1, \xc9, \xcd, \xd3, \xda, \xdd\n\xe2, \xea, \xee, \xf4, \xfb \xc2, \xca, \xce, \xd4, \xdb\n\xe3, \xf1, \xf5 \xc3, \xd1, \xd5\n\xe4, \xeb, \xef, \xf6, \xfc, \xff \xc4, \xcb, \xcf, \xd6, \xdc, \u0178\n\xe5, \xc5",
+        expectedOutput: "a, e, i, o, u  A, E, I, O, U\na, e, i, o, u, y A, E, I, O, U, Y\na, e, i, o, u A, E, I, O, U\na, n, o A, N, O\na, e, i, o, u, y A, E, I, O, U, Y\na, A",
+        recipeConfig: [
+            {
+                "op": "Remove Diacritics",
+                "args": []
+            },
+        ],
+    },
+]);