diff --git a/src/test/java/it/aboutbits/springboot/toolbox/validation/validator/ScaledBigDecimalValidatorTest.java b/src/test/java/it/aboutbits/springboot/toolbox/validation/validator/ScaledBigDecimalValidatorTest.java
new file mode 100644
index 0000000..814ca56
--- /dev/null
+++ b/src/test/java/it/aboutbits/springboot/toolbox/validation/validator/ScaledBigDecimalValidatorTest.java
@@ -0,0 +1,200 @@
+package it.aboutbits.springboot.toolbox.validation.validator;
+
+import it.aboutbits.springboot.toolbox.type.ScaledBigDecimal;
+import jakarta.validation.Validation;
+import jakarta.validation.ValidatorFactory;
+import jakarta.validation.constraints.Max;
+import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.Negative;
+import jakarta.validation.constraints.NegativeOrZero;
+import jakarta.validation.constraints.Positive;
+import jakarta.validation.constraints.PositiveOrZero;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class ScaledBigDecimalValidatorTest {
+    private static final ValidatorFactory VALIDATOR_FACTORY = Validation.buildDefaultValidatorFactory();
+
+    @Nested
+    class PositiveConstraint {
+        record Sut(@Positive ScaledBigDecimal value) {
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {0.0000001, 1, 100_000_000.9999})
+        void valid_shouldSucceed(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isEmpty();
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {-1, -0.0000001, 0})
+        void inValid_shouldFail(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isNotEmpty();
+        }
+    }
+
+    @Nested
+    class PositiveOrZeroConstraint {
+        record Sut(@PositiveOrZero ScaledBigDecimal value) {
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {0, 0.0000001, 1, 100_000_000.9999})
+        void valid_shouldSucceed(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isEmpty();
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {-1, -0.0000001})
+        void inValid_shouldFail(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isNotEmpty();
+        }
+    }
+
+    @Nested
+    class NegativeConstraint {
+        record Sut(@Negative ScaledBigDecimal value) {
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {-1, -0.0000001})
+        void valid_shouldSucceed(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isEmpty();
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {0, 0.0000001, 1, 100_000_000.9999})
+        void inValid_shouldFail(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isNotEmpty();
+        }
+    }
+
+    @Nested
+    class NegativeOrZeroConstraint {
+        record Sut(@NegativeOrZero ScaledBigDecimal value) {
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {-1, -0.0000001, 0})
+        void valid_shouldSucceed(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isEmpty();
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {0.0000001, 1, 100_000_000.9999})
+        void inValid_shouldFail(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isNotEmpty();
+        }
+    }
+
+    @Nested
+    class MinConstraint {
+        record Sut(@Min(50) ScaledBigDecimal value) {
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {50, 50.0000001, 100_000_000.9999})
+        void valid_shouldSucceed(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isEmpty();
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {-1, -0.0000001, 0, 49, 49.999999})
+        void inValid_shouldFail(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isNotEmpty();
+        }
+    }
+
+    @Nested
+    class MaxConstraint {
+        record Sut(@Max(-50) ScaledBigDecimal value) {
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {-100_000_000.99999, -50.000001, -50})
+        void valid_shouldSucceed(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isEmpty();
+        }
+
+        @ParameterizedTest
+        @ValueSource(doubles = {-49.999999, -49, 0, 100_000_000})
+        void inValid_shouldFail(double doubleValue) {
+            var validator = VALIDATOR_FACTORY.getValidator();
+
+            var instance = new Sut(ScaledBigDecimal.valueOf(doubleValue));
+
+            var violations = validator.validate(instance);
+
+            assertThat(violations).isNotEmpty();
+        }
+    }
+}