diff --git a/test/bienstman1.cpp b/test/bienstman1.cpp
index 281c89aa..dc006578 100644
--- a/test/bienstman1.cpp
+++ b/test/bienstman1.cpp
@@ -11,7 +11,7 @@ struct A {};
 
 struct V 
 {
-
+ virtual ~V() {}; // silence compiler warningsa
  virtual void f() = 0;
 
  const A* inside() {return &a;}
diff --git a/test/bienstman3.cpp b/test/bienstman3.cpp
index 1a8a7714..d765b303 100644
--- a/test/bienstman3.cpp
+++ b/test/bienstman3.cpp
@@ -7,6 +7,7 @@
 
 struct V 
 {
+ virtual ~V() {}; // silence compiler warningsa
  virtual void f() = 0;
 };
 
diff --git a/test/implicit.cpp b/test/implicit.cpp
index 61ca21a7..a1bae59e 100644
--- a/test/implicit.cpp
+++ b/test/implicit.cpp
@@ -24,6 +24,7 @@ X make_x(int n) { return X(n); }
 struct bar {};
 struct foo
 {
+    virtual ~foo() {}; // silence compiler warnings
     virtual void f() = 0;
     operator bar() const { return bar(); }
 };
diff --git a/test/pointer_vector.cpp b/test/pointer_vector.cpp
index c1f7dbd4..08cd4861 100644
--- a/test/pointer_vector.cpp
+++ b/test/pointer_vector.cpp
@@ -10,6 +10,7 @@ using namespace boost::python;
 class Abstract
 {
 public:   
+    virtual ~Abstract() {}; // silence compiler warningsa
     virtual std::string    f() =0;
 };