diff --git a/test/ck_tile/transform_conv_to_gemm/test_transform_conv_bwd_weight_to_gemm.cpp b/test/ck_tile/transform_conv_to_gemm/test_transform_conv_bwd_weight_to_gemm.cpp
index 73afe286d3..1229b4a6fb 100644
--- a/test/ck_tile/transform_conv_to_gemm/test_transform_conv_bwd_weight_to_gemm.cpp
+++ b/test/ck_tile/transform_conv_to_gemm/test_transform_conv_bwd_weight_to_gemm.cpp
@@ -24,6 +24,7 @@ struct TestConfig
     static constexpr index_t NDim = NDimSpatial;
     static constexpr ConvolutionSpecialization ConvSpec = ConvolutionSpecialization::Default;
     static constexpr bool SplitN = false;
+    static constexpr index_t NumberOfGroupsToMerge = NumGroupsToMerge;
     
     using ADataType = float;
     using CDataType = float;
@@ -43,6 +44,11 @@ using TestConfig1D_no_merge = TestConfig<1>;
 using TestConfig2D_no_merge = TestConfig<2>;
 using TestConfig3D_no_merge = TestConfig<3>;
 
+constexpr index_t GroupsToMerge = 2;
+using TestConfig1D_merge = TestConfig<1, GroupsToMerge>;
+using TestConfig2D_merge = TestConfig<2, GroupsToMerge>;
+using TestConfig3D_merge = TestConfig<3, GroupsToMerge>;
+
 // Test class template
 template <typename Config>
 class TestTransformConvBwdWeightToGemm : public ::testing::Test
@@ -171,7 +177,10 @@ protected:
 using TestTypes = ::testing::Types<
   TestConfig1D_no_merge, 
   TestConfig2D_no_merge, 
-  TestConfig3D_no_merge>;
+  TestConfig3D_no_merge,
+  TestConfig1D_merge, 
+  TestConfig2D_merge, 
+  TestConfig3D_merge>;
 
 TYPED_TEST_SUITE(TestTransformConvBwdWeightToGemm, TestTypes);
 
@@ -246,7 +255,6 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, Constructor)
     }
 }
 
-
 // Test grid descriptors
 TYPED_TEST(TestTransformConvBwdWeightToGemm, GridDescriptors)
 {
@@ -256,6 +264,8 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, GridDescriptors)
     constexpr auto I2 = number<2>{};
     constexpr auto I3 = number<3>{};
     
+    constexpr index_t Gm = TypeParam::NumberOfGroupsToMerge;
+
     if constexpr (NDim == 1) 
     {
         typename TypeParam::TransformType transform(this->a_g_n_c_wis_lengths_1d_,
@@ -272,7 +282,7 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, GridDescriptors)
         auto wei_grid_desc = transform.template make_wei_grid_desc<1>();
         
         // Verify output grid descriptor dimensions
-        EXPECT_EQ(out_grid_desc.get_length(I0), this->K_);
+        EXPECT_EQ(out_grid_desc.get_length(I0), this->K_ * Gm);
         EXPECT_EQ(out_grid_desc.get_length(I1), this->N_ * this->Wo_);
         
         // Verify input grid descriptor dimensions
@@ -281,8 +291,8 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, GridDescriptors)
         EXPECT_EQ(in_grid_desc.get_length(I2), this->C_);
         
         // Verify weight grid descriptor dimensions
-        EXPECT_EQ(wei_grid_desc.get_length(I0), this->K_);
-        EXPECT_EQ(wei_grid_desc.get_length(I1), this->X_ * this->C_);
+        EXPECT_EQ(wei_grid_desc.get_length(I0), this->K_ * Gm);
+        EXPECT_EQ(wei_grid_desc.get_length(I1), this->X_ * this->C_ * Gm);
         
     } 
     else if constexpr (NDim == 2) 
@@ -301,7 +311,7 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, GridDescriptors)
         auto wei_grid_desc = transform.template make_wei_grid_desc<2>();
         
         // Verify output grid descriptor dimensions
-        EXPECT_EQ(out_grid_desc.get_length(I0), this->K_);
+        EXPECT_EQ(out_grid_desc.get_length(I0), this->K_ * Gm);
         EXPECT_EQ(out_grid_desc.get_length(I1), this->N_ * this->Ho_ * this->Wo_);
         
         // Verify input grid descriptor dimensions
@@ -311,8 +321,8 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, GridDescriptors)
         EXPECT_EQ(in_grid_desc.get_length(I3), this->C_);
         
         // Verify weight grid descriptor dimensions
-        EXPECT_EQ(wei_grid_desc.get_length(I0), this->K_);
-        EXPECT_EQ(wei_grid_desc.get_length(I1), this->Y_ * this->X_ * this->C_);
+        EXPECT_EQ(wei_grid_desc.get_length(I0), this->K_ * Gm);
+        EXPECT_EQ(wei_grid_desc.get_length(I1), this->Y_ * this->X_ * this->C_ * Gm);
         
     } 
     else if constexpr (NDim == 3) 
@@ -331,7 +341,7 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, GridDescriptors)
         auto wei_grid_desc = transform.template make_wei_grid_desc<3>();
         
         // Verify output grid descriptor dimensions
-        EXPECT_EQ(out_grid_desc.get_length(I0), this->K_);
+        EXPECT_EQ(out_grid_desc.get_length(I0), this->K_ * Gm);
         EXPECT_EQ(out_grid_desc.get_length(I1), this->N_ * this->Do_ * this->Ho_ * this->Wo_);
         
         // Verify input grid descriptor dimensions
@@ -342,14 +352,15 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, GridDescriptors)
         EXPECT_EQ(in_grid_desc.get_length(number<4>{}), this->C_);
         
         // Verify weight grid descriptor dimensions
-        EXPECT_EQ(wei_grid_desc.get_length(I0), this->K_);
-        EXPECT_EQ(wei_grid_desc.get_length(I1), this->Z_ * this->Y_ * this->X_ * this->C_);
+        EXPECT_EQ(wei_grid_desc.get_length(I0), this->K_ * Gm);
+        EXPECT_EQ(wei_grid_desc.get_length(I1), this->Z_ * this->Y_ * this->X_ * this->C_ * Gm);
     }
 }
 
 // Test ABC grid descriptors
 TYPED_TEST(TestTransformConvBwdWeightToGemm, ABCGridDescriptors)
 {
+    constexpr index_t Gm = TypeParam::NumberOfGroupsToMerge;
     constexpr index_t NDim = TypeParam::NDim;
     constexpr auto I0 = number<0>{};
     constexpr auto I1 = number<1>{};
@@ -372,11 +383,11 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, ABCGridDescriptors)
         const auto& wei_desc = abc_descriptors[I2];
         
         // Verify the descriptors are correctly created
-        EXPECT_EQ(out_desc.get_length(I0), this->K_);
-        EXPECT_EQ(wei_desc.get_length(I0), this->K_);
+        EXPECT_EQ(out_desc.get_length(I0), this->K_ * Gm);
+        EXPECT_EQ(wei_desc.get_length(I0), this->K_ * Gm);
         
         // For input descriptor, verify the transformed dimensions
-        EXPECT_EQ(in_desc.get_length(I0), this->X_ * this->C_);
+        EXPECT_EQ(in_desc.get_length(I0), this->X_ * this->C_ * Gm);
         EXPECT_EQ(in_desc.get_length(I1), this->N_ * this->Wo_);
         
     } 
@@ -397,11 +408,11 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, ABCGridDescriptors)
         const auto& wei_desc = abc_descriptors[I2];
         
         // Verify the descriptors are correctly created
-        EXPECT_EQ(out_desc.get_length(I0), this->K_);
-        EXPECT_EQ(wei_desc.get_length(I0), this->K_);
+        EXPECT_EQ(out_desc.get_length(I0), this->K_ * Gm);
+        EXPECT_EQ(wei_desc.get_length(I0), this->K_ * Gm);
         
         // For input descriptor, verify the transformed dimensions
-        EXPECT_EQ(in_desc.get_length(I0), this->Y_ * this->X_ * this->C_);
+        EXPECT_EQ(in_desc.get_length(I0), this->Y_ * this->X_ * this->C_ * Gm);
         EXPECT_EQ(in_desc.get_length(I1), this->N_ * this->Ho_ * this->Wo_);
         
     } 
@@ -422,11 +433,11 @@ TYPED_TEST(TestTransformConvBwdWeightToGemm, ABCGridDescriptors)
         const auto& wei_desc = abc_descriptors[I2];
 
         // Verify the descriptors are correctly created
-        EXPECT_EQ(out_desc.get_length(I0), this->K_);
-        EXPECT_EQ(wei_desc.get_length(I0), this->K_);
+        EXPECT_EQ(out_desc.get_length(I0), this->K_ * Gm);
+        EXPECT_EQ(wei_desc.get_length(I0), this->K_ * Gm);
         
         // For input descriptor, verify the transformed dimensions
-        EXPECT_EQ(in_desc.get_length(I0), this->Z_ * this->Y_ * this->X_ * this->C_);
+        EXPECT_EQ(in_desc.get_length(I0), this->Z_ * this->Y_ * this->X_ * this->C_ * Gm);
         EXPECT_EQ(in_desc.get_length(I1), this->N_ * this->Do_ * this->Ho_ * this->Wo_);
     }
 }