adapt test to the change reverting normalize() to returning void
diff --git a/test/adjoint.cpp b/test/adjoint.cpp
index 98d7aab..11b82b4 100644
--- a/test/adjoint.cpp
+++ b/test/adjoint.cpp
@@ -74,9 +74,9 @@
     VERIFY_IS_APPROX(v1.squaredNorm(),                v1.norm() * v1.norm());
     // check normalized() and normalize()
     VERIFY_IS_APPROX(v1, v1.norm() * v1.normalized());
-    // normalize() returns a reference to *this
     v3 = v1;
-    VERIFY_IS_APPROX(v1, v1.norm() * v3.normalize());
+    v3.normalize();
+    VERIFY_IS_APPROX(v1, v1.norm() * v3);
     VERIFY_IS_APPROX(v3, v1.normalized());
     VERIFY_IS_APPROX(v3.norm(), RealScalar(1));
   }