diff --git a/backends-velox/src/test/scala/org/apache/gluten/execution/VeloxOrcDataTypeValidationSuite.scala b/backends-velox/src/test/scala/org/apache/gluten/execution/VeloxOrcDataTypeValidationSuite.scala
index de942f4ba2..87c641a2dc 100644
--- a/backends-velox/src/test/scala/org/apache/gluten/execution/VeloxOrcDataTypeValidationSuite.scala
+++ b/backends-velox/src/test/scala/org/apache/gluten/execution/VeloxOrcDataTypeValidationSuite.scala
@@ -429,11 +429,7 @@ class VeloxOrcDataTypeValidationSuite extends VeloxWholeStageTransformerSuite {
         " type2 where type1.struct.struct_1 = type2.struct.struct_1") { _ => }
   }
 
-  // TODO: Re-enable once Velox implements HugeintValuesUsingHashTable::mergeWith.
-  // The hash join on decimal(38, 18) pushes a hugeint dynamic filter into the scan
-  // (velox#18159), and merging it with the existing IsNotNull filter throws
-  // "mergeWith() is not supported".
-  ignore("Decimal type") {
+  test("Decimal type") {
     // Validation: BatchScan Project Aggregate Expand Sort Limit
     runQueryAndCompare(
       "select int, decimal from type1 " +
diff --git a/backends-velox/src/test/scala/org/apache/gluten/execution/VeloxParquetDataTypeValidationSuite.scala b/backends-velox/src/test/scala/org/apache/gluten/execution/VeloxParquetDataTypeValidationSuite.scala
index 01b23b1129..1408b4c651 100644
--- a/backends-velox/src/test/scala/org/apache/gluten/execution/VeloxParquetDataTypeValidationSuite.scala
+++ b/backends-velox/src/test/scala/org/apache/gluten/execution/VeloxParquetDataTypeValidationSuite.scala
@@ -430,11 +430,7 @@ class VeloxParquetDataTypeValidationSuite extends VeloxWholeStageTransformerSuit
         " type2 where type1.struct.struct_1 = type2.struct.struct_1") { _ => }
   }
 
-  // TODO: Re-enable once Velox implements HugeintValuesUsingHashTable::mergeWith.
-  // The hash join on decimal(38, 18) pushes a hugeint dynamic filter into the scan
-  // (velox#18159), and merging it with the existing IsNotNull filter throws
-  // "mergeWith() is not supported".
-  ignore("Decimal type") {
+  test("Decimal type") {
     // Validation: BatchScan Project Aggregate Expand Sort Limit
     runQueryAndCompare(
       "select int, decimal from type1 " +