diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index adcee5704..458d39860 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -27,5 +27,5 @@ add_subdirectory(libslic3r)
 add_subdirectory(timeutils)
 add_subdirectory(fff_print)
 add_subdirectory(sla_print)
-add_subdirectory(cpp17)
+add_subdirectory(cpp17 EXCLUDE_FROM_ALL)    # does not have to be built all the time
 # add_subdirectory(example)
diff --git a/tests/cpp17/main.cpp b/tests/cpp17/main.cpp
index 385d863a3..f053b4fb4 100644
--- a/tests/cpp17/main.cpp
+++ b/tests/cpp17/main.cpp
@@ -72,6 +72,7 @@ int main()
     
     static_assert (isIntegral(10), "" );
     // would fail to compile: static_assert (isIntegral(10.0), "" );
+    
     std::cout << "Integer is integral: " << isIntegral(0) << std::endl;
     std::cout << "Floating point is not integral: " << isIntegral(0.0) << std::endl;