diff --git a/unittest/python/test_user_type.py b/unittest/python/test_user_type.py
index 87f314c7..2d71b835 100644
--- a/unittest/python/test_user_type.py
+++ b/unittest/python/test_user_type.py
@@ -68,8 +68,17 @@ def test_cast(from_dtype, to_dtype):
 test_cast(user_type.CustomDouble, np.int32)
 test_cast(np.int32, user_type.CustomDouble)
 
-test(user_type.CustomFloat)
-
 v = user_type.CustomDouble(1)
 a = np.array(v)
 assert type(v) is a.dtype.type
+
+test(user_type.CustomFloat)
+
+test_cast(user_type.CustomFloat, np.float32)
+test_cast(np.double, user_type.CustomFloat)
+
+test_cast(user_type.CustomFloat, np.int64)
+test_cast(np.int64, user_type.CustomFloat)
+
+test_cast(user_type.CustomFloat, np.int32)
+test_cast(np.int32, user_type.CustomFloat)
diff --git a/unittest/user_type.cpp b/unittest/user_type.cpp
index dcafea1a..dddf8fe6 100644
--- a/unittest/user_type.cpp
+++ b/unittest/user_type.cpp
@@ -201,14 +201,19 @@ BOOST_PYTHON_MODULE(user_type) {
 
   eigenpy::registerCast<DoubleType, double>(true);
   eigenpy::registerCast<double, DoubleType>(true);
+  eigenpy::registerCast<DoubleType, float>(false);
+  eigenpy::registerCast<float, DoubleType>(true);
   eigenpy::registerCast<DoubleType, int>(false);
   eigenpy::registerCast<int, DoubleType>(true);
   eigenpy::registerCast<DoubleType, long long>(false);
   eigenpy::registerCast<long long, DoubleType>(true);
   eigenpy::registerCast<DoubleType, long>(false);
   eigenpy::registerCast<long, DoubleType>(true);
+
   eigenpy::registerCast<FloatType, double>(true);
   eigenpy::registerCast<double, FloatType>(false);
+  eigenpy::registerCast<FloatType, float>(true);
+  eigenpy::registerCast<float, FloatType>(true);
   eigenpy::registerCast<FloatType, long long>(false);
   eigenpy::registerCast<long long, FloatType>(true);
   eigenpy::registerCast<FloatType, int>(false);