diff --git a/.changeset/short-bats-tell.md b/.changeset/short-bats-tell.md
new file mode 100644
index 0000000..a344eb3
--- /dev/null
+++ b/.changeset/short-bats-tell.md
@@ -0,0 +1,5 @@
+---
+"@croz/nrich-form-configuration-core": patch
+---
+
+An enhancement has been made to the schema merger function to address its previous limitations when using "yup" required() validator function.
diff --git a/libs/form-configuration/core/src/converter/FormConfigurationValidationConverter.ts b/libs/form-configuration/core/src/converter/FormConfigurationValidationConverter.ts
index c73c90a..853e6b9 100644
--- a/libs/form-configuration/core/src/converter/FormConfigurationValidationConverter.ts
+++ b/libs/form-configuration/core/src/converter/FormConfigurationValidationConverter.ts
@@ -116,6 +116,7 @@ export class FormConfigurationValidationConverter {
           if (obj1[key].type === "object" && obj2[key].type === "object") {
             merged[key] = this.mergeSchemas(obj1[key], obj2[key]);
             merged[key].spec = _mergeWith(obj1[key].spec, obj2[key].spec, (field1, field2) => (typeof field1 === "boolean" ? field1 && field2 : field1 ?? field2));
+            merged[key].internalTests = { ...obj1[key].internalTests, ...obj2[key].internalTests };
           }
           else if (obj1[key].type === "array" && obj2[key].type === "array") {
             if (obj1[key].innerType.type === "object" && obj2[key].innerType.type === "object") {
diff --git a/libs/form-configuration/core/test/converter/FormConfigurationValidationConverter.test.ts b/libs/form-configuration/core/test/converter/FormConfigurationValidationConverter.test.ts
index 6d8d890..a5f0a7e 100644
--- a/libs/form-configuration/core/test/converter/FormConfigurationValidationConverter.test.ts
+++ b/libs/form-configuration/core/test/converter/FormConfigurationValidationConverter.test.ts
@@ -271,3 +271,18 @@ it.each([
   // then
   expect(mergedSchema.describe()).toEqual(expectedResult.expectedResult.describe());
 });
+
+it("merge schemas method should merge internalTests from both schema objects", () => {
+  // given
+  const converter = new FormConfigurationValidationConverter();
+  const schema1 = yup.object().shape({ obj1: yup.object().required() });
+  const schema2 = yup.object().shape({ obj1: yup.object() });
+
+  // when
+  const result = converter.mergeSchemas(schema1, schema2);
+
+  // then
+  expect(result.isValidSync({ obj1: undefined })).toBe(false);
+  expect(result.isValidSync({ obj1: null })).toBe(false);
+  expect(result.isValidSync({ obj1: {} })).toBe(true);
+});