diff --git a/generator/final_processor_country.hpp b/generator/final_processor_country.hpp
index 7293fbde0d..9d4ff86857 100644
--- a/generator/final_processor_country.hpp
+++ b/generator/final_processor_country.hpp
@@ -32,6 +32,8 @@ public:
   // FinalProcessorIntermediateMwmInterface overrides:
   void Process() override;
 
+  void ProcessBuildingParts();
+
 private:
   //void Order();
   void ProcessRoutingCityBoundaries();
@@ -42,7 +44,6 @@ private:
   void AddIsolines();
   void DropProhibitedSpeedCameras();
   //void Finish();
-  void ProcessBuildingParts();
 
   bool IsCountry(std::string const & filename);
 
diff --git a/generator/generator_integration_tests/towns_tests.cpp b/generator/generator_integration_tests/towns_tests.cpp
index 7b7d507f95..abe65f3833 100644
--- a/generator/generator_integration_tests/towns_tests.cpp
+++ b/generator/generator_integration_tests/towns_tests.cpp
@@ -1,6 +1,10 @@
 #include "testing/testing.hpp"
 
+#include "generator/final_processor_country.hpp"
 #include "generator/towns_dumper.hpp"
+#include "generator/utils.hpp"
+
+#include "indexer/classificator_loader.hpp"
 
 #include "geometry/distance_on_sphere.hpp"
 #include "geometry/mercator.hpp"
@@ -19,7 +23,7 @@ UNIT_TEST(MajorTowns_KansasCity)
   auto const rect = mercator::RectByCenterXYAndSizeInMeters(mercator::FromLatLon(kansasCity), distanceThreshold);
 
   // Get this file from intermediate_data folder of full data generation process.
-  std::ifstream in("./data/" TOWNS_FILE);
+  std::ifstream in("./data-integration/" TOWNS_FILE);
 
   std::string line;
   while (std::getline(in, line))
@@ -36,3 +40,30 @@ UNIT_TEST(MajorTowns_KansasCity)
     }
   }
 }
+
+namespace
+{
+class TestAffiliation : public feature::AffiliationInterface
+{
+  std::vector<std::string> GetAffiliations(feature::FeatureBuilder const & fb) const override { return {}; }
+  std::vector<std::string> GetAffiliations(m2::PointD const & point) const override { return {}; }
+
+  bool HasCountryByName(std::string const & name) const override
+  {
+    return !strings::StartsWith(name, "World");
+  }
+};
+} // namespace
+
+UNIT_TEST(CountryFinalProcessor_ProcessBuildingParts)
+{
+  std::signal(SIGABRT, generator::ErrorHandler);
+  std::signal(SIGSEGV, generator::ErrorHandler);
+
+  classificator::Load();
+
+  // Put *.mwm.tmp files into ./data-integration folder for tests.
+  generator::CountryFinalProcessor processor(std::make_shared<TestAffiliation>(), "./data-integration",
+                                             1 /* threadsCount */);
+  processor.ProcessBuildingParts();
+}