Fixed test.

tests/test_curl.cpp

@@ -244,7 +244,7 @@ int main(void)
 
     std::cout << Bmagentafg << " *** TESTING: CURL ***" << reset << std::endl;
     for (size_t go = 1; go < 2; go++)
-        for (size_t ao = 3; ao < 5; ao++)
+        for (size_t ao = go; ao < 6; ao++)
             failed_tests += test_curl_convergence(go, ao);
 
     return failed_tests;

tests/test_differentiation.cpp

@@ -223,7 +223,7 @@ int main(void)
 
     std::cout << Bmagentafg << " *** TESTING: DIFFERENTIATION ***" << reset << std::endl;
     for (size_t go = 1; go < 5; go++)
-        for (size_t ao = go; ao < 5; ao++)
+        for (size_t ao = go; ao < 6; ao++)
             failed_tests += test_differentiation_convergence(go, ao);
 
     return failed_tests;