diff --git a/packages/eslint-plugin/tests/rules/only-throw-error.test.ts b/packages/eslint-plugin/tests/rules/only-throw-error.test.ts
index 0ae3f0e00769..a836485f8a8d 100644
--- a/packages/eslint-plugin/tests/rules/only-throw-error.test.ts
+++ b/packages/eslint-plugin/tests/rules/only-throw-error.test.ts
@@ -132,6 +132,11 @@ function fun(value: any) {
     `
 function fun(value: unknown) {
   throw value;
+}
+    `,
+    `
+function fun<T extends Error>(t: T): void {
+  throw t;
 }
     `,
   ],
@@ -468,5 +473,17 @@ function fun(value: unknown) {
         },
       ],
     },
+    {
+      code: `
+function fun<T extends number>(t: T): void {
+  throw t;
+}
+      `,
+      errors: [
+        {
+          messageId: 'object',
+        },
+      ],
+    },
   ],
 });
diff --git a/packages/eslint-plugin/tests/rules/prefer-promise-reject-errors.test.ts b/packages/eslint-plugin/tests/rules/prefer-promise-reject-errors.test.ts
index e78575881255..c8981a31b3f0 100644
--- a/packages/eslint-plugin/tests/rules/prefer-promise-reject-errors.test.ts
+++ b/packages/eslint-plugin/tests/rules/prefer-promise-reject-errors.test.ts
@@ -275,6 +275,12 @@ ruleTester.run('prefer-promise-reject-errors', rule, {
         }
       }
     `,
+    `
+      declare const foo: PromiseConstructor;
+      function fun<T extends Error>(t: T): void {
+        foo.reject(t);
+      }
+    `,
   ],
   invalid: [
     {
@@ -1443,5 +1449,23 @@ Bar.reject(5);
         },
       ],
     },
+    {
+      code: `
+declare const foo: PromiseConstructor;
+function fun<T extends number>(t: T): void {
+  foo.reject(t);
+}
+      `,
+      errors: [
+        {
+          messageId: 'rejectAnError',
+          type: AST_NODE_TYPES.CallExpression,
+          line: 4,
+          endLine: 4,
+          column: 3,
+          endColumn: 16,
+        },
+      ],
+    },
   ],
 });
diff --git a/packages/type-utils/src/builtinSymbolLikes.ts b/packages/type-utils/src/builtinSymbolLikes.ts
index c1095be513a3..7686531a40d3 100644
--- a/packages/type-utils/src/builtinSymbolLikes.ts
+++ b/packages/type-utils/src/builtinSymbolLikes.ts
@@ -1,3 +1,4 @@
+import * as tsutils from 'ts-api-utils';
 import * as ts from 'typescript';
 
 import { isSymbolFromDefaultLibrary } from './isSymbolFromDefaultLibrary';
@@ -158,6 +159,16 @@ export function isBuiltinSymbolLikeRecurser(
       isBuiltinSymbolLikeRecurser(program, t, predicate),
     );
   }
+  // https://github.com/JoshuaKGoldberg/ts-api-utils/issues/382
+  if ((tsutils.isTypeParameter as (type: ts.Type) => boolean)(type)) {
+    const t = type.getConstraint();
+
+    if (t) {
+      return isBuiltinSymbolLikeRecurser(program, t, predicate);
+    }
+
+    return false;
+  }
 
   const predicateResult = predicate(type);
   if (typeof predicateResult === 'boolean') {