diff --git a/packages/knex/src/schema/SchemaComparator.ts b/packages/knex/src/schema/SchemaComparator.ts
index e2270849d89d..a9ccae6f34aa 100644
--- a/packages/knex/src/schema/SchemaComparator.ts
+++ b/packages/knex/src/schema/SchemaComparator.ts
@@ -524,8 +524,10 @@ export class SchemaComparator {
   }
 
   diffCheck(check1: Check, check2: Check): boolean {
-    const unquote = (str?: string) => str?.replace(/['"`]/g, '');
-    return unquote(check1.expression as string) !== unquote(check2.expression as string);
+    // check constraint definition might be normalized by the driver,
+    // e.g. quotes might be added (https://github.com/mikro-orm/mikro-orm/issues/3827)
+    const simplify = (str?: string) => str?.replace(/['"`()]/g, '').toLowerCase();
+    return simplify(check1.expression as string) !== simplify(check2.expression as string);
   }
 
   hasSameDefaultValue(from: Column, to: Column): boolean {
diff --git a/tests/features/schema-generator/__snapshots__/check-constraint.postgres.test.ts.snap b/tests/features/schema-generator/__snapshots__/check-constraint.postgres.test.ts.snap
index 382b14a61388..737e89a38163 100644
--- a/tests/features/schema-generator/__snapshots__/check-constraint.postgres.test.ts.snap
+++ b/tests/features/schema-generator/__snapshots__/check-constraint.postgres.test.ts.snap
@@ -20,7 +20,7 @@ exports[`check constraint [postgres] check constraint diff [postgres]: postgres-
 `;
 
 exports[`check constraint [postgres] check constraint diff [postgres]: postgres-check-constraint-diff-4 1`] = `
-"alter table "new_table" add constraint bar check(price > 0);
+"alter table "new_table" add constraint bar check(price > 0 and price < 123);
 
 "
 `;
diff --git a/tests/features/schema-generator/check-constraint.postgres.test.ts b/tests/features/schema-generator/check-constraint.postgres.test.ts
index b203ec5b77e1..1a6f212a1234 100644
--- a/tests/features/schema-generator/check-constraint.postgres.test.ts
+++ b/tests/features/schema-generator/check-constraint.postgres.test.ts
@@ -83,10 +83,12 @@ describe('check constraint [postgres]', () => {
     await generator.execute(diff);
 
     // Add new check
-    newTableMeta.checks = [{ name: 'bar', expression: 'price > 0' }];
+    newTableMeta.checks = [{ name: 'bar', expression: 'price > 0 and price < 123' }];
     diff = await orm.schema.getUpdateSchemaSQL({ wrap: false });
     expect(diff).toMatchSnapshot('postgres-check-constraint-diff-4');
     await generator.execute(diff);
+    diff = await orm.schema.getUpdateSchemaSQL({ wrap: false });
+    expect(diff).toBe('');
 
     // Skip existing check
     diff = await orm.schema.getUpdateSchemaSQL({ wrap: false });