diff --git a/src/errors.test.ts b/src/errors.test.ts
index 744503c..c7fd698 100644
--- a/src/errors.test.ts
+++ b/src/errors.test.ts
@@ -27,18 +27,6 @@ describe('errors', () => {
             error: new class {
                 public readonly digest = 'DYNAMIC_SERVER_USAGE';
             }(),
-            expected: false,
-        },
-        {
-            error: new class DynamicServerError {
-                public readonly digest = 'foo';
-            }(),
-            expected: false,
-        },
-        {
-            error: new class DynamicServerError {
-                public readonly digest = 'DYNAMIC_SERVER_USAGE';
-            }(),
             expected: true,
         },
     ])('should return $expected for $error identifying a DynamicServerError', ({error, expected}) => {
diff --git a/src/errors.ts b/src/errors.ts
index 2c6fffb..f488994 100644
--- a/src/errors.ts
+++ b/src/errors.ts
@@ -5,7 +5,6 @@ export declare class DynamicServerError extends Error {
 export function isDynamicServerError(error: unknown): error is DynamicServerError {
     return typeof error === 'object'
         && error !== null
-        && error.constructor.name === 'DynamicServerError'
         && 'digest' in error
         && error.digest === 'DYNAMIC_SERVER_USAGE';
 }