diff --git a/crates/specialized/rtx-cfd/tests/kernels_tests.rs b/crates/specialized/rtx-cfd/tests/kernels_tests.rs
index a8b8f29..bb1ff10 100644
--- a/crates/specialized/rtx-cfd/tests/kernels_tests.rs
+++ b/crates/specialized/rtx-cfd/tests/kernels_tests.rs
@@ -40,13 +40,13 @@ mod cuda_tests {
 
         // Allocate GPU memory
         let mut d_phi = kernel_manager.allocate_f32(nx)?;
-        let d_phi_new = kernel_manager.allocate_f32(nx)?;
+        let mut d_phi_new = kernel_manager.allocate_f32(nx)?;
 
         // Copy to GPU
         d_phi = kernel_manager.copy_to_device(&phi)?;
 
         // Run advection kernel
-        advection_kernel.apply(&d_phi, &d_phi_new, velocity as f32, dt as f32, dx as f32)?;
+        advection_kernel.apply(&d_phi, &mut d_phi_new, velocity as f32, dt as f32, dx as f32)?;
 
         // Copy result back
         let mut result = vec![0.0f32; nx];
@@ -98,10 +98,10 @@ mod cuda_tests {
         }
 
         let mut d_phi = kernel_manager.allocate_f32(nx)?;
-        let d_phi_new = kernel_manager.allocate_f32(nx)?;
+        let mut d_phi_new = kernel_manager.allocate_f32(nx)?;
 
         d_phi = kernel_manager.copy_to_device(&phi)?;
-        advection_kernel.apply(&d_phi, &d_phi_new, velocity as f32, dt as f32, dx as f32)?;
+        advection_kernel.apply(&d_phi, &mut d_phi_new, velocity as f32, dt as f32, dx as f32)?;
 
         let mut result = vec![0.0f32; nx];
         result = kernel_manager.copy_from_device(&d_phi_new)?;
@@ -133,10 +133,10 @@ mod cuda_tests {
         }
 
         let mut d_temp = kernel_manager.allocate_f32(nx)?;
-        let d_temp_new = kernel_manager.allocate_f32(nx)?;
+        let mut d_temp_new = kernel_manager.allocate_f32(nx)?;
 
         d_temp = kernel_manager.copy_to_device(&temperature)?;
-        diffusion_kernel.apply(&d_temp, &d_temp_new, alpha as f32, dt as f32, dx as f32)?;
+        diffusion_kernel.apply(&d_temp, &mut d_temp_new, alpha as f32, dt as f32, dx as f32)?;
 
         let mut result = vec![0.0f32; nx];
         result = kernel_manager.copy_from_device(&d_temp_new)?;