diff --git a/src/core/config/OperationConfig.js b/src/core/config/OperationConfig.js
index 08c18d25..c5b9dd27 100755
--- a/src/core/config/OperationConfig.js
+++ b/src/core/config/OperationConfig.js
@@ -2322,12 +2322,27 @@ const OperationConfig = {
             {
                 name: "Case insensitive",
                 type: "boolean",
-                value: Regex.REGEX_CASE_INSENSITIVE
+                value: true
             },
             {
-                name: "Multiline matching",
+                name: "^ and $ match at newlines",
                 type: "boolean",
-                value: Regex.REGEX_MULTILINE_MATCHING
+                value: true
+            },
+            {
+                name: "Dot matches all",
+                type: "boolean",
+                value: false
+            },
+            {
+                name: "Unicode support",
+                type: "boolean",
+                value: false
+            },
+            {
+                name: "Astral support",
+                type: "boolean",
+                value: false
             },
             {
                 name: "Display total",
diff --git a/src/core/operations/Regex.js b/src/core/operations/Regex.js
index 5cb374d1..9c6b2f8e 100644
--- a/src/core/operations/Regex.js
+++ b/src/core/operations/Regex.js
@@ -71,16 +71,6 @@ const Regex = {
             value: "[A-Za-z\\d/\\-:.,_$%\\x27\"()<>= !\\[\\]{}@]{4,}"
         },
     ],
-    /**
-     * @constant
-     * @default
-     */
-    REGEX_CASE_INSENSITIVE: true,
-    /**
-     * @constant
-     * @default
-     */
-    REGEX_MULTILINE_MATCHING: true,
     /**
      * @constant
      * @default
@@ -100,15 +90,21 @@ const Regex = {
      * @returns {html}
      */
     runRegex: function(input, args) {
-        let userRegex = args[1],
+        const userRegex = args[1],
             i = args[2],
             m = args[3],
-            displayTotal = args[4],
-            outputFormat = args[5],
-            modifiers = "g";
+            s = args[4],
+            u = args[5],
+            a = args[6],
+            displayTotal = args[7],
+            outputFormat = args[8];
+        let modifiers = "g";
 
         if (i) modifiers += "i";
         if (m) modifiers += "m";
+        if (s) modifiers += "s";
+        if (u) modifiers += "u";
+        if (a) modifiers += "A";
 
         if (userRegex && userRegex !== "^" && userRegex !== "$") {
             try {
@@ -275,7 +271,7 @@ const Regex = {
         if (displayTotal)
             output = "Total found: " + total + "\n\n" + output;
 
-        return output;
+        return output.slice(0, -1);
     },
 };
 
diff --git a/test/index.js b/test/index.js
index 5c397dea..e58d7e20 100644
--- a/test/index.js
+++ b/test/index.js
@@ -30,6 +30,7 @@ import "./tests/operations/MS.js";
 import "./tests/operations/PHP.js";
 import "./tests/operations/NetBIOS.js";
 import "./tests/operations/OTP.js";
+import "./tests/operations/Regex.js";
 import "./tests/operations/StrUtils.js";
 import "./tests/operations/SeqUtils.js";
 
diff --git a/test/tests/operations/StrUtils.js b/test/tests/operations/StrUtils.js
index 6e66b266..8110d067 100644
--- a/test/tests/operations/StrUtils.js
+++ b/test/tests/operations/StrUtils.js
@@ -8,21 +8,6 @@
 import TestRegister from "../../TestRegister.js";
 
 TestRegister.addTests([
-    {
-        name: "Regex, non-HTML op",
-        input: "/<>",
-        expectedOutput: "/<>",
-        recipeConfig: [
-            {
-                "op": "Regular expression",
-                "args": ["User defined", "", true, true, false, "Highlight matches"]
-            },
-            {
-                "op": "Remove whitespace",
-                "args": [true, true, true, true, true, false]
-            }
-        ],
-    },
     {
         name: "Diff, basic usage",
         input: "testing23\n\ntesting123",