diff --git a/c/tests/CMakeLists.txt b/c/tests/CMakeLists.txt
index 0218f8d4b8..11307518a4 100644
--- a/c/tests/CMakeLists.txt
+++ b/c/tests/CMakeLists.txt
@@ -74,11 +74,15 @@ ConfigureTest(NAME BRUTEFORCE_C_TEST PATH neighbors/run_brute_force_c.c neighbor
 ConfigureTest(NAME IVF_FLAT_C_TEST PATH neighbors/run_ivf_flat_c.c neighbors/ann_ivf_flat_c.cu)
 ConfigureTest(NAME IVF_PQ_C_TEST PATH neighbors/run_ivf_pq_c.c neighbors/ann_ivf_pq_c.cu)
 ConfigureTest(NAME CAGRA_C_TEST PATH neighbors/ann_cagra_c.cu)
-ConfigureTest(NAME MG_C_TEST PATH neighbors/run_mg_c.c neighbors/ann_mg_c.cu)
 ConfigureTest(
   NAME ALL_NEIGHBORS_C_TEST PATH neighbors/run_all_neighbors_c.c neighbors/all_neighbors_c.cu
 )
 
+if(BUILD_MG_ALGOS)
+  ConfigureTest(NAME MG_C_TEST PATH neighbors/run_mg_c.c neighbors/ann_mg_c.cu)
+  target_compile_definitions(MG_C_TEST PUBLIC CUVS_BUILD_MG_ALGOS)
+endif()
+
 if(BUILD_CAGRA_HNSWLIB)
   ConfigureTest(NAME HNSW_C_TEST PATH neighbors/ann_hnsw_c.cu)
   target_link_libraries(HNSW_C_TEST PRIVATE hnswlib::hnswlib)