diff --git a/test/test_nc_t.hpp b/test/test_nc_t.hpp
index 65af7e647..8e0edabdc 100644
--- a/test/test_nc_t.hpp
+++ b/test/test_nc_t.hpp
@@ -550,8 +550,10 @@ void test_accuracy(T, const char* type_name)
       do_test_nc_t<T>(nct_asym, type_name, "Non Central T (large parameters)");
       quantile_sanity_check<T>(nct_asym, type_name, "Non Central T (large parameters)");
 
+#ifndef BOOST_MP_TEST
 #include "nc_t_pdf_data.ipp"
       do_test_nc_t_pdf<T>(nc_t_pdf_data, type_name, "Non Central T PDF");
+#endif
    }
 }
 
diff --git a/test/test_nc_t_quad.cpp b/test/test_nc_t_quad.cpp
index 5b7ac27d3..4c544bc24 100644
--- a/test/test_nc_t_quad.cpp
+++ b/test/test_nc_t_quad.cpp
@@ -26,11 +26,15 @@
 #include <boost/test/unit_test.hpp>
 #include <boost/test/tools/floating_point_comparison.hpp> // for BOOST_CHECK_CLOSE
 
-#define SC_(x) static_cast<T>(BOOST_STRINGIZE(x))
+#define SC_(x) static_cast<typename table_type<T>::type>(BOOST_STRINGIZE(x))
 
 #include "functor.hpp"
 #include "handle_test_result.hpp"
 #include "table_type.hpp"
+//
+// define this otherwise compile times are too long:
+//
+#define BOOST_MP_TEST
 #include "test_nc_t.hpp"
 
 #include <iostream>
@@ -93,7 +97,7 @@ BOOST_AUTO_TEST_CASE( test_main )
    expected_results();
 #ifndef DISABLE_THIS_TEST
 #if !BOOST_WORKAROUND(BOOST_MSVC, < 1920)
-   test_spots(boost::multiprecision::cpp_bin_float_quad(0));
+   //test_spots(boost::multiprecision::cpp_bin_float_quad(0));
 #endif
    test_accuracy(boost::multiprecision::cpp_bin_float_quad(0), "cpp_bin_float_quad");
 #endif