diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index e22b446b6..f5980ba16 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -441,7 +441,6 @@ if(BUILD_SHARED_LIBS)
     src/neighbors/nn_descent_int8.cu
     src/neighbors/nn_descent_uint8.cu
     src/neighbors/reachability.cu
-    src/neighbors/quantization.cu
     src/neighbors/refine/detail/refine_device_float_float.cu
     src/neighbors/refine/detail/refine_device_half_float.cu
     src/neighbors/refine/detail/refine_device_int8_t_float.cu
@@ -458,6 +457,7 @@ if(BUILD_SHARED_LIBS)
     src/neighbors/vamana_serialize_float.cu
     src/neighbors/vamana_serialize_uint8.cu
     src/neighbors/vamana_serialize_int8.cu
+    src/preprocessing/quantization.cu
     src/selection/select_k_float_int64_t.cu
     src/selection/select_k_float_int32_t.cu
     src/selection/select_k_float_uint32_t.cu
diff --git a/cpp/include/cuvs/preprocessing/quantization.hpp b/cpp/include/cuvs/preprocessing/quantization.hpp
index 10ef306ac..f3b638004 100644
--- a/cpp/include/cuvs/preprocessing/quantization.hpp
+++ b/cpp/include/cuvs/preprocessing/quantization.hpp
@@ -16,7 +16,6 @@
 
 #pragma once
 
-#include <cuvs/neighbors/common.hpp>
 #include <raft/core/device_mdarray.hpp>
 #include <raft/core/device_mdspan.hpp>
 #include <raft/core/handle.hpp>
@@ -25,7 +24,7 @@
 
 #include <cuda_fp16.h>
 
-namespace cuvs::neighbors::quantization {
+namespace cuvs::preprocessing::quantization {
 
 /**
  * @brief ScalarQuantizer parameters.
@@ -192,4 +191,4 @@ class ScalarQuantizer {
   T max_;
 };
 
-}  // namespace cuvs::neighbors::quantization
+}  // namespace cuvs::preprocessing::quantization
diff --git a/cpp/src/preprocessing/detail/quantization.cuh b/cpp/src/preprocessing/detail/quantization.cuh
index b44a254d4..cd5d85515 100644
--- a/cpp/src/preprocessing/detail/quantization.cuh
+++ b/cpp/src/preprocessing/detail/quantization.cuh
@@ -16,7 +16,7 @@
 
 #pragma once
 
-#include <cuvs/neighbors/quantization.hpp>
+#include <cuvs/preprocessing/quantization.hpp>
 #include <raft/core/operators.hpp>
 #include <raft/linalg/unary_op.cuh>
 #include <raft/random/rng.cuh>
@@ -25,7 +25,7 @@
 #include <thrust/sort.h>
 #include <thrust/system/omp/execution_policy.h>
 
-namespace cuvs::neighbors::detail {
+namespace cuvs::preprocessing::detail {
 
 template <class T>
 _RAFT_HOST_DEVICE bool fp_equals(const T& a, const T& b)
@@ -214,4 +214,4 @@ raft::host_matrix<T, int64_t> inverse_scalar_transform(
   return out;
 }
 
-}  // namespace cuvs::neighbors::detail
+}  // namespace cuvs::preprocessing::detail
diff --git a/cpp/src/preprocessing/quantization.cu b/cpp/src/preprocessing/quantization.cu
index e8b609fa8..411e9509b 100644
--- a/cpp/src/preprocessing/quantization.cu
+++ b/cpp/src/preprocessing/quantization.cu
@@ -16,9 +16,9 @@
 
 #include "./detail/quantization.cuh"
 
-#include <cuvs/neighbors/quantization.hpp>
+#include <cuvs/preprocessing/quantization.hpp>
 
-namespace cuvs::neighbors::quantization {
+namespace cuvs::preprocessing::quantization {
 
 template <typename T, typename QuantI>
 void ScalarQuantizer<T, QuantI>::train(raft::resources const& res,
@@ -126,7 +126,7 @@ _RAFT_HOST_DEVICE T ScalarQuantizer<T, QuantI>::max() const
 }
 
 #define CUVS_INST_QUANTIZATION(T, QuantI) \
-  template struct cuvs::neighbors::quantization::ScalarQuantizer<T, QuantI>;
+  template struct cuvs::preprocessing::quantization::ScalarQuantizer<T, QuantI>;
 
 CUVS_INST_QUANTIZATION(double, int8_t);
 CUVS_INST_QUANTIZATION(float, int8_t);
@@ -134,4 +134,4 @@ CUVS_INST_QUANTIZATION(half, int8_t);
 
 #undef CUVS_INST_QUANTIZATION
 
-}  // namespace cuvs::neighbors::quantization
\ No newline at end of file
+}  // namespace cuvs::preprocessing::quantization
\ No newline at end of file
diff --git a/cpp/test/CMakeLists.txt b/cpp/test/CMakeLists.txt
index 33bb9c00a..1433d6411 100644
--- a/cpp/test/CMakeLists.txt
+++ b/cpp/test/CMakeLists.txt
@@ -93,18 +93,8 @@ endfunction()
 
 if(BUILD_TESTS)
   ConfigureTest(
-    NAME
-    NEIGHBORS_TEST
-    PATH
-    neighbors/brute_force.cu
-    neighbors/brute_force_prefiltered.cu
-    neighbors/sparse_brute_force.cu
-    neighbors/refine.cu
-    neighbors/quantization.cu
-    GPUS
-    1
-    PERCENT
-    100
+    NAME NEIGHBORS_TEST PATH neighbors/brute_force.cu neighbors/brute_force_prefiltered.cu
+    neighbors/sparse_brute_force.cu neighbors/refine.cu GPUS 1 PERCENT 100
   )
 
   ConfigureTest(
@@ -223,6 +213,9 @@ if(BUILD_TESTS)
     PERCENT
     100
   )
+
+  ConfigureTest(NAME PREPROCESSING_TEST PATH preprocessing/quantization.cu GPUS 1 PERCENT 100)
+
   ConfigureTest(
     NAME STATS_TEST PATH stats/trustworthiness.cu stats/silhouette_score.cu GPUS 1 PERCENT 100
   )
diff --git a/cpp/test/preprocessing/quantization.cu b/cpp/test/preprocessing/quantization.cu
index 7bc1c5291..c67ef8ef4 100644
--- a/cpp/test/preprocessing/quantization.cu
+++ b/cpp/test/preprocessing/quantization.cu
@@ -15,7 +15,7 @@
  */
 
 #include "../test_utils.cuh"
-#include <cuvs/neighbors/quantization.hpp>
+#include <cuvs/preprocessing/quantization.hpp>
 #include <raft/core/resource/cuda_stream.hpp>
 #include <raft/linalg/transpose.cuh>
 #include <raft/matrix/init.cuh>
@@ -23,11 +23,11 @@
 #include <thrust/execution_policy.h>
 #include <thrust/sort.h>
 
-namespace cuvs::neighbors::quantization {
+namespace cuvs::preprocessing::quantization {
 
 template <typename T>
 struct QuantizationInputs {
-  cuvs::neighbors::quantization::sq_params quantization_params;
+  cuvs::preprocessing::quantization::sq_params quantization_params;
   int rows;
   int cols;
   T min            = T(-1.0);
@@ -105,7 +105,7 @@ class QuantizationTest : public ::testing::TestWithParam<QuantizationInputs<T>>
     size_t print_size = std::min(input_.size(), 20ul);
 
     // train quantizer_1 on device
-    cuvs::neighbors::quantization::ScalarQuantizer<T, QuantI> quantizer_1;
+    cuvs::preprocessing::quantization::ScalarQuantizer<T, QuantI> quantizer_1;
     quantizer_1.train(handle, params_.quantization_params, dataset);
     std::cerr << "Q1: trained = " << quantizer_1.is_trained()
               << ", min = " << (double)quantizer_1.min() << ", max = " << (double)quantizer_1.max()
@@ -160,7 +160,7 @@ class QuantizationTest : public ::testing::TestWithParam<QuantizationInputs<T>>
     }
 
     // train quantizer_2 on host
-    cuvs::neighbors::quantization::ScalarQuantizer<T, QuantI> quantizer_2;
+    cuvs::preprocessing::quantization::ScalarQuantizer<T, QuantI> quantizer_2;
     quantizer_2.train(handle, params_.quantization_params, dataset_h);
     std::cerr << "Q2: trained = " << quantizer_2.is_trained()
               << ", min = " << (double)quantizer_2.min() << ", max = " << (double)quantizer_2.max()
@@ -274,4 +274,4 @@ INSTANTIATE_TEST_CASE_P(QuantizationTest,
                         QuantizationTest_half_int8t,
                         ::testing::ValuesIn(inputs<half>));
 
-}  // namespace cuvs::neighbors::quantization
+}  // namespace cuvs::preprocessing::quantization