diff --git a/cpp/unittest/db/CMakeLists.txt b/cpp/unittest/db/CMakeLists.txt
index 3def6210f74a624a8919511277b3fbb00db78940..75d7bf037e5f651765fcd887f8681e15ddf2636a 100644
--- a/cpp/unittest/db/CMakeLists.txt
+++ b/cpp/unittest/db/CMakeLists.txt
@@ -51,6 +51,10 @@ set(db_libs
 
 if(${BUILD_FAISS_WITH_MKL} STREQUAL "ON")
     set(db_libs ${db_libs} ${MKL_LIBS} ${MKL_LIBS})
+else()
+    set(db_libs ${db_libs}
+            lapack
+            openblas)
 endif()
 
 target_link_libraries(db_test ${db_libs} ${unittest_libs})
diff --git a/cpp/unittest/faiss_wrapper/CMakeLists.txt b/cpp/unittest/faiss_wrapper/CMakeLists.txt
index 136876570c3c6a9ea40d0dd952d0b20891090ad7..90d2ae36e5d4a814ad0c3d1da15fff4b4f2fb73b 100644
--- a/cpp/unittest/faiss_wrapper/CMakeLists.txt
+++ b/cpp/unittest/faiss_wrapper/CMakeLists.txt
@@ -40,6 +40,10 @@ set(wrapper_libs
         )
 if(${BUILD_FAISS_WITH_MKL} STREQUAL "ON")
     set(wrapper_libs ${wrapper_libs} ${MKL_LIBS} ${MKL_LIBS})
+else()
+    set(wrapper_libs ${wrapper_libs}
+            lapack
+            openblas)
 endif()
 
 target_link_libraries(wrapper_test ${wrapper_libs} ${unittest_libs})
diff --git a/cpp/unittest/metrics/CMakeLists.txt b/cpp/unittest/metrics/CMakeLists.txt
index 6f28a88b42abee5bd02174691a10a3345801440b..06662283823348c13ed1d542d88451619b2829cd 100644
--- a/cpp/unittest/metrics/CMakeLists.txt
+++ b/cpp/unittest/metrics/CMakeLists.txt
@@ -69,6 +69,10 @@ target_link_libraries(metrics_test
         )
 if(${BUILD_FAISS_WITH_MKL} STREQUAL "ON")
     target_link_libraries(metrics_test ${MKL_LIBS} ${MKL_LIBS})
+else()
+    target_link_libraries(metrics_test
+            lapack
+            openblas)
 endif()
 
 install(TARGETS metrics_test DESTINATION bin)
\ No newline at end of file
diff --git a/cpp/unittest/server/CMakeLists.txt b/cpp/unittest/server/CMakeLists.txt
index 88a149ad7e90bd1d7e5e276a9c8618bf87d4fb77..7c46da68f7201e5ee5c3d95a93f1f51b69cec749 100644
--- a/cpp/unittest/server/CMakeLists.txt
+++ b/cpp/unittest/server/CMakeLists.txt
@@ -50,6 +50,10 @@ set(require_libs
 
 if(${BUILD_FAISS_WITH_MKL} STREQUAL "ON")
     set(require_libs ${require_libs} ${MKL_LIBS} ${MKL_LIBS})
+else()
+    set(require_libs ${require_libs}
+            lapack
+            openblas)
 endif()
 
 target_link_libraries(server_test