diff --git a/unittest/vslib/test_sai_vs_interfacequery.cpp b/unittest/vslib/test_sai_vs_interfacequery.cpp
new file mode 100644
index 000000000000..0db425ab47da
--- /dev/null
+++ b/unittest/vslib/test_sai_vs_interfacequery.cpp
@@ -0,0 +1,57 @@
+#include <gtest/gtest.h>
+
+extern "C" {
+#include "sai.h"
+}
+
+#include "swss/logger.h"
+
+TEST(libsaivs, sai_log_set)
+{
+    EXPECT_EQ(SAI_STATUS_NOT_IMPLEMENTED, sai_log_set(SAI_API_VLAN, SAI_LOG_LEVEL_NOTICE));
+}
+
+TEST(libsaivs, sai_api_query)
+{
+    sai_vlan_api_t *api = nullptr;
+
+    EXPECT_EQ(SAI_STATUS_INVALID_PARAMETER, sai_api_query(SAI_API_VLAN, nullptr));
+    EXPECT_EQ(SAI_STATUS_INVALID_PARAMETER, sai_api_query(SAI_API_UNSPECIFIED, (void**)&api));
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+    EXPECT_EQ(SAI_STATUS_INVALID_PARAMETER, sai_api_query((sai_api_t)(1000), (void**)&api));
+#pragma GCC diagnostic pop
+
+    EXPECT_EQ(SAI_STATUS_SUCCESS, sai_api_query(SAI_API_VLAN, (void**)&api));
+}
+
+TEST(libsaivs, sai_query_attribute_capability)
+{
+    EXPECT_EQ(SAI_STATUS_INVALID_PARAMETER, sai_query_attribute_capability(0,SAI_OBJECT_TYPE_NULL,0,0));
+}
+
+TEST(libsaivs, sai_query_attribute_enum_values_capability)
+{
+    EXPECT_EQ(SAI_STATUS_INVALID_PARAMETER, sai_query_attribute_enum_values_capability(0,SAI_OBJECT_TYPE_NULL,0,0));
+}
+
+TEST(libsaivs, sai_object_type_get_availability)
+{
+    EXPECT_EQ(SAI_STATUS_INVALID_PARAMETER, sai_object_type_get_availability(0,SAI_OBJECT_TYPE_NULL,0,0,0));
+}
+
+TEST(libsaivs, sai_dbg_generate_dump)
+{
+    EXPECT_EQ(SAI_STATUS_NOT_IMPLEMENTED, sai_dbg_generate_dump(nullptr));
+}
+
+TEST(libsaivs, sai_object_type_query)
+{
+    EXPECT_EQ(SAI_OBJECT_TYPE_NULL, sai_object_type_query(SAI_NULL_OBJECT_ID));
+}
+
+TEST(libsaivs, sai_switch_id_query)
+{
+    EXPECT_EQ(SAI_NULL_OBJECT_ID, sai_switch_id_query(SAI_NULL_OBJECT_ID));
+}