diff --git a/scripts/apidoc/signature.ts b/scripts/apidoc/signature.ts
index dafd2c6d112..91691e69fe1 100644
--- a/scripts/apidoc/signature.ts
+++ b/scripts/apidoc/signature.ts
@@ -15,7 +15,7 @@ import type {
   MethodParameter,
 } from '../../docs/.vitepress/components/api-docs/method';
 import { faker } from '../../src';
-import { pathOutputDir } from './utils';
+import { formatTypescript, pathOutputDir } from './utils';
 // TODO ST-DDT 2022-02-20: Actually import this/fix module import errors
 // import vitepressConfig from '../../docs/.vitepress/config';
 
@@ -245,6 +245,8 @@ function typeToText(type_: Type, short = false): string {
         type.indexType,
         short
       )}]`;
+    case 'literal':
+      return formatTypescript(type.toString()).replace(/;\n$/, '');
     default:
       return type.toString();
   }
diff --git a/test/scripts/apidoc/signature.example.ts b/test/scripts/apidoc/signature.example.ts
index 2219b072659..de1cd79a00d 100644
--- a/test/scripts/apidoc/signature.example.ts
+++ b/test/scripts/apidoc/signature.example.ts
@@ -115,6 +115,15 @@ export class SignatureTest {
     return fn('a');
   }
 
+  /**
+   * Test with string union.
+   *
+   * @param value `'a'` or `'b'`.
+   */
+  stringUnionParamMethod(value: 'a' | 'b'): string {
+    return value;
+  }
+
   /**
    * Test with LiteralUnion.
    *
diff --git a/test/scripts/apidoc/signature.expected.json b/test/scripts/apidoc/signature.expected.json
index 5e4f913afdd..32920f7894d 100644
--- a/test/scripts/apidoc/signature.expected.json
+++ b/test/scripts/apidoc/signature.expected.json
@@ -39,12 +39,12 @@
     "parameters": [
       {
         "name": "value",
-        "type": "\"a\" | \"b\" | string",
+        "type": "'a' | 'b' | string",
         "description": "<p><code>'a'</code> or <code>'b'</code>.</p>\n"
       }
     ],
     "returns": "string",
-    "examples": "<div class=\"language-ts\"><pre v-pre><code>faker<span class=\"token punctuation\">.</span><span class=\"token function\">literalUnionParamMethod</span><span class=\"token punctuation\">(</span>value<span class=\"token operator\">:</span> <span class=\"token string\">\"a\"</span> <span class=\"token operator\">|</span> <span class=\"token string\">\"b\"</span> <span class=\"token operator\">|</span> <span class=\"token builtin\">string</span><span class=\"token punctuation\">)</span><span class=\"token operator\">:</span> <span class=\"token builtin\">string</span>\n</code></pre>\n</div>",
+    "examples": "<div class=\"language-ts\"><pre v-pre><code>faker<span class=\"token punctuation\">.</span><span class=\"token function\">literalUnionParamMethod</span><span class=\"token punctuation\">(</span>value<span class=\"token operator\">:</span> <span class=\"token string\">'a'</span> <span class=\"token operator\">|</span> <span class=\"token string\">'b'</span> <span class=\"token operator\">|</span> <span class=\"token builtin\">string</span><span class=\"token punctuation\">)</span><span class=\"token operator\">:</span> <span class=\"token builtin\">string</span>\n</code></pre>\n</div>",
     "deprecated": false,
     "seeAlsos": []
   },
@@ -272,5 +272,21 @@
     "examples": "<div class=\"language-ts\"><pre v-pre><code>faker<span class=\"token punctuation\">.</span><span class=\"token function\">requiredNumberParamMethod</span><span class=\"token punctuation\">(</span>a<span class=\"token operator\">:</span> <span class=\"token builtin\">number</span><span class=\"token punctuation\">)</span><span class=\"token operator\">:</span> <span class=\"token builtin\">number</span>\n</code></pre>\n</div>",
     "deprecated": false,
     "seeAlsos": []
+  },
+  "stringUnionParamMethod": {
+    "name": "stringUnionParamMethod",
+    "title": "String Union Param Method",
+    "description": "<p>Test with string union.</p>\n",
+    "parameters": [
+      {
+        "name": "value",
+        "type": "'a' | 'b'",
+        "description": "<p><code>'a'</code> or <code>'b'</code>.</p>\n"
+      }
+    ],
+    "returns": "string",
+    "examples": "<div class=\"language-ts\"><pre v-pre><code>faker<span class=\"token punctuation\">.</span><span class=\"token function\">stringUnionParamMethod</span><span class=\"token punctuation\">(</span>value<span class=\"token operator\">:</span> <span class=\"token string\">'a'</span> <span class=\"token operator\">|</span> <span class=\"token string\">'b'</span><span class=\"token punctuation\">)</span><span class=\"token operator\">:</span> <span class=\"token builtin\">string</span>\n</code></pre>\n</div>",
+    "deprecated": false,
+    "seeAlsos": []
   }
 }