diff --git a/test/eif_dummy_arg_disambiguation.cpp b/test/eif_dummy_arg_disambiguation.cpp
index ab65f4f..78346c0 100644
--- a/test/eif_dummy_arg_disambiguation.cpp
+++ b/test/eif_dummy_arg_disambiguation.cpp
@@ -24,11 +24,11 @@ template <int N> struct dummy {
 
 template<class T>
 typename enable_if<is_arithmetic<T>, bool>::type
-arithmetic_object(T t, dummy<0> = 0) { return true; }
+arithmetic_object(T /*t*/, dummy<0> = 0) { return true; }
 
 template<class T>
 typename disable_if<is_arithmetic<T>, bool>::type
-arithmetic_object(T t, dummy<1> = 0) { return false; }
+arithmetic_object(T /*t*/, dummy<1> = 0) { return false; }
 
 
 int main()
@@ -42,4 +42,3 @@ int main()
 
   return boost::report_errors();
 }
-
diff --git a/test/eif_lazy_test.cpp b/test/eif_lazy_test.cpp
index 905d0a9..8938a3d 100644
--- a/test/eif_lazy_test.cpp
+++ b/test/eif_lazy_test.cpp
@@ -60,21 +60,21 @@ namespace A {
 
   template<class T>
   typename lazy_enable_if<is_int_or_double<T>, some_traits<T> >::type
-  foo(T t) { return true; }
+  foo(T /*t*/) { return true; }
 
   template<class T>
   typename lazy_enable_if_c<is_int_or_double<T>::value, some_traits<T> >::type
-  foo2(T t) { return true; }
+  foo2(T /*t*/) { return true; }
 }
 
 namespace B {
   template<class T>
   typename lazy_disable_if<is_int_or_double<T>, make_bool<T> >::type
-  foo(T t) { return false; }
+  foo(T /*t*/) { return false; }
 
   template<class T>
   typename lazy_disable_if_c<is_int_or_double<T>::value, make_bool<T> >::type
-  foo2(T t) { return false; }
+  foo2(T /*t*/) { return false; }
 }
 
 int main()
@@ -95,4 +95,3 @@ int main()
 
   return boost::report_errors();
 }
-
diff --git a/test/eif_namespace_disambiguation.cpp b/test/eif_namespace_disambiguation.cpp
index d5589ae..fd24a4b 100644
--- a/test/eif_namespace_disambiguation.cpp
+++ b/test/eif_namespace_disambiguation.cpp
@@ -26,13 +26,13 @@ template<class T> struct not_
 namespace A {
   template<class T>
   typename enable_if<is_arithmetic<T>, bool>::type
-  arithmetic_object(T t) { return true; }
+  arithmetic_object(T /*t*/) { return true; }
 }
 
 namespace B {
   template<class T>
   typename enable_if<not_<is_arithmetic<T> >, bool>::type
-  arithmetic_object(T t) { return false; }
+  arithmetic_object(T /*t*/) { return false; }
 }
 
 int main()
@@ -47,4 +47,3 @@ int main()
 
   return boost::report_errors();
 }
-
diff --git a/test/eif_no_disambiguation.cpp b/test/eif_no_disambiguation.cpp
index 3853cbf..37afb43 100644
--- a/test/eif_no_disambiguation.cpp
+++ b/test/eif_no_disambiguation.cpp
@@ -25,11 +25,11 @@ template<class T> struct not_
 
 template<class T>
 typename enable_if<is_arithmetic<T>, bool>::type
-arithmetic_object(T t) { return true; }
+arithmetic_object(T /*t*/) { return true; }
 
 template<class T>
 typename enable_if<not_<is_arithmetic<T> >, bool>::type
-arithmetic_object(T t) { return false; }
+arithmetic_object(T /*t*/) { return false; }
 
 
 int main()
@@ -43,4 +43,3 @@ int main()
 
   return boost::report_errors();
 }
-