diff --git a/test/basics.hpp b/test/basics.hpp
index 4bed83b..41b94f5 100644
--- a/test/basics.hpp
+++ b/test/basics.hpp
@@ -9,15 +9,14 @@
 
 #include <boost/parameter.hpp>
 
-#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
 #if (BOOST_PARAMETER_MAX_ARITY < 4)
 #error Define BOOST_PARAMETER_MAX_ARITY as 4 or greater.
 #endif
-#if (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 5)
+#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) && \
+    (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 5)
 #error Define BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY \
 as 5 or greater.
 #endif
-#endif
 
 #include <boost/mpl/bool.hpp>
 #include <boost/mpl/if.hpp>
diff --git a/test/earwicker.cpp b/test/earwicker.cpp
index 46260d2..f71a965 100644
--- a/test/earwicker.cpp
+++ b/test/earwicker.cpp
@@ -5,15 +5,14 @@
 
 #include <boost/parameter/config.hpp>
 
-#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
 #if (BOOST_PARAMETER_MAX_ARITY < 4)
 #error Define BOOST_PARAMETER_MAX_ARITY as 4 or greater.
 #endif
-#if (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 5)
+#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) && \
+    (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 5)
 #error Define BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY \
 as 5 or greater.
 #endif
-#endif
 
 #include <boost/parameter/name.hpp>
 
diff --git a/test/ntp.cpp b/test/ntp.cpp
index f574296..798f182 100644
--- a/test/ntp.cpp
+++ b/test/ntp.cpp
@@ -5,8 +5,7 @@
 
 #include <boost/parameter/config.hpp>
 
-#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) && \
-    (BOOST_PARAMETER_MAX_ARITY < 4)
+#if (BOOST_PARAMETER_MAX_ARITY < 4)
 #error Define BOOST_PARAMETER_MAX_ARITY as 4 or greater.
 #endif
 
diff --git a/test/optional_deduced_sfinae.cpp b/test/optional_deduced_sfinae.cpp
index 56b7245..b77cc05 100644
--- a/test/optional_deduced_sfinae.cpp
+++ b/test/optional_deduced_sfinae.cpp
@@ -5,15 +5,14 @@
 
 #include <boost/parameter/config.hpp>
 
-#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
 #if (BOOST_PARAMETER_MAX_ARITY < 2)
 #error Define BOOST_PARAMETER_MAX_ARITY as 2 or greater.
 #endif
-#if (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 2)
+#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) && \
+    (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 2)
 #error Define BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY \
 as 2 or greater.
 #endif
-#endif
 
 #include <boost/parameter/preprocessor.hpp>
 #include <boost/parameter/name.hpp>
diff --git a/test/sfinae.cpp b/test/sfinae.cpp
index 46dbe51..c99b097 100644
--- a/test/sfinae.cpp
+++ b/test/sfinae.cpp
@@ -5,10 +5,10 @@
 
 #include <boost/parameter/config.hpp>
 
-#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
 #if (BOOST_PARAMETER_MAX_ARITY < 2)
 #error Define BOOST_PARAMETER_MAX_ARITY as 2 or greater.
 #endif
+#if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
 #if (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 3)
 #error Define BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY \
 as 3 or greater.