diff --git a/packages/eslint-plugin/src/rules/no-unnecessary-type-assertion.ts b/packages/eslint-plugin/src/rules/no-unnecessary-type-assertion.ts
index d29bd1292d02..c73d8717c3e1 100644
--- a/packages/eslint-plugin/src/rules/no-unnecessary-type-assertion.ts
+++ b/packages/eslint-plugin/src/rules/no-unnecessary-type-assertion.ts
@@ -13,7 +13,6 @@ import {
   getDeclaration,
   getModifiers,
   getParserServices,
-  getTypeName,
   isNullableType,
   isTypeFlagSet,
   nullThrows,
@@ -225,13 +224,9 @@ export default createRule<Options, MessageIds>({
         const uncastType = services.getTypeAtLocation(node.expression);
         const typeIsUnchanged = isTypeUnchanged(uncastType, castType);
 
-        const isAssertionTypeUnionStringlike =
-          castType.isUnion() && getTypeName(checker, castType) === 'string';
-
-        const wouldSameTypeBeInferred =
-          castType.isLiteral() || isAssertionTypeUnionStringlike
-            ? isImplicitlyNarrowedConstDeclaration(node)
-            : !isConstAssertion(node.typeAnnotation);
+        const wouldSameTypeBeInferred = castType.isLiteral()
+          ? isImplicitlyNarrowedConstDeclaration(node)
+          : !isConstAssertion(node.typeAnnotation);
 
         if (typeIsUnchanged && wouldSameTypeBeInferred) {
           context.report({
diff --git a/packages/eslint-plugin/tests/rules/no-unnecessary-type-assertion.test.ts b/packages/eslint-plugin/tests/rules/no-unnecessary-type-assertion.test.ts
index a4d34d1881bb..db8309164efb 100644
--- a/packages/eslint-plugin/tests/rules/no-unnecessary-type-assertion.test.ts
+++ b/packages/eslint-plugin/tests/rules/no-unnecessary-type-assertion.test.ts
@@ -358,16 +358,6 @@ if (Math.random()) {
 x!;
       `,
     },
-    "let a = (Date.now() % 2 ? 'a' : 'b') as 'a' | 'b';",
-    `
-      const state: 'expired' | 'pending' = 'pending';
-
-      function main() {
-        return {
-          type: \`\${state}Request\` as \`\${typeof state}Request\`,
-        };
-      }
-    `,
   ],
 
   invalid: [
@@ -1161,16 +1151,5 @@ const a = '';
 const b: string | undefined = (a ? undefined : a);
       `,
     },
-    {
-      code: "const a = (Date.now() % 2 ? 'a' : 'b') as 'a' | 'b';",
-      errors: [
-        {
-          column: 11,
-          line: 1,
-          messageId: 'unnecessaryAssertion',
-        },
-      ],
-      output: `const a = (Date.now() % 2 ? 'a' : 'b');`,
-    },
   ],
 });