diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index b14f56b..6363a8d 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -213,3 +213,4 @@ add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD COMMAND ${CMAKE_COMMA
 add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CMAKE_SOURCE_DIR}/src/block.dat" $<TARGET_FILE_DIR:${CMAKE_PROJECT_NAME}>)
 add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CMAKE_SOURCE_DIR}/src/sidechain_dump.dat.gz" $<TARGET_FILE_DIR:${CMAKE_PROJECT_NAME}>)
 add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CMAKE_SOURCE_DIR}/src/sidechain_dump_mini.dat.gz" $<TARGET_FILE_DIR:${CMAKE_PROJECT_NAME}>)
+add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CMAKE_SOURCE_DIR}/src/sidechain_dump_nano.dat.gz" $<TARGET_FILE_DIR:${CMAKE_PROJECT_NAME}>)
diff --git a/tests/cmake/flags.cmake b/tests/cmake/flags.cmake
index c3be48f..9f5f675 100644
--- a/tests/cmake/flags.cmake
+++ b/tests/cmake/flags.cmake
@@ -1,10 +1,14 @@
 if (CMAKE_CXX_COMPILER_ID MATCHES GNU)
 	set(GENERAL_FLAGS "-pthread")
 	set(WARNING_FLAGS "-Wall -Wextra")
-	set(OPTIMIZATION_FLAGS "-O3 -ffast-math -s")
 
-	if (WITH_LTO)
-		set(OPTIMIZATION_FLAGS "${OPTIMIZATION_FLAGS} -flto=auto -fuse-linker-plugin")
+	if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+		set(OPTIMIZATION_FLAGS "-O0 -g3 -ftrapv")
+	else()
+		set(OPTIMIZATION_FLAGS "-O3 -ffast-math -s")
+		if (WITH_LTO)
+			set(OPTIMIZATION_FLAGS "${OPTIMIZATION_FLAGS} -flto=auto -fuse-linker-plugin")
+		endif()
 	endif()
 
 	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
diff --git a/tests/src/pool_block_tests.cpp b/tests/src/pool_block_tests.cpp
index 3058a8e..760988f 100644
--- a/tests/src/pool_block_tests.cpp
+++ b/tests/src/pool_block_tests.cpp
@@ -117,19 +117,27 @@ TEST(pool_block, verify)
 		uint64_t m_txinGenHeight;
 		uint64_t m_sidechainHeight;
 		bool m_shuffle;
-	} tests[4] = {
+	} tests[6] = {
 		{ "default", "sidechain_dump.dat", 3258121, 9443762, false },
 		{ "default", "sidechain_dump.dat", 3258121, 9443762, true },
 		{ "mini", "sidechain_dump_mini.dat", 3258121, 8912067, false },
 		{ "mini", "sidechain_dump_mini.dat", 3258121, 8912067, true },
+		{ "nano", "sidechain_dump_nano.dat", 3438036, 116651, false },
+		{ "nano", "sidechain_dump_nano.dat", 3438036, 116651, true },
 	};
 
 	for (const STest& t : tests)
 	{
 		SideChain sidechain(nullptr, NetworkType::Mainnet, t.m_poolName);
 
-		// Difficulty of block 3256320
-		sidechain.m_testMainChainDiff = difficulty_type(374140388237ULL, 0ULL);
+		if (strcmp(t.m_poolName, "nano") == 0) {
+			// Difficulty of block 3436544
+			sidechain.m_testMainChainDiff = difficulty_type(568969201978ULL, 0ULL);
+		}
+		else {
+			// Difficulty of block 3256320
+			sidechain.m_testMainChainDiff = difficulty_type(374140388237ULL, 0ULL);
+		}
 
 		std::ifstream f(t.m_fileName, std::ios::binary | std::ios::ate);
 		ASSERT_EQ(f.good() && f.is_open(), true);
diff --git a/tests/src/sidechain_dump_nano.dat.gz b/tests/src/sidechain_dump_nano.dat.gz
new file mode 100644
index 0000000..32de24c
Binary files /dev/null and b/tests/src/sidechain_dump_nano.dat.gz differ