diff --git a/src/ffi3/datetime.rs b/src/ffi3/datetime.rs
index f09ea3da..f90e0347 100644
--- a/src/ffi3/datetime.rs
+++ b/src/ffi3/datetime.rs
@@ -181,14 +181,19 @@ pub unsafe fn PyDate_Check(op: *mut PyObject) -> c_int {
     PyObject_TypeCheck(op, PyDateTimeAPI.DateType) as c_int
 }
 
+#[inline(always)]
+pub unsafe fn PyDate_CheckExact(op: *mut PyObject) -> c_int {
+    (Py_TYPE(op) == PyDateTimeAPI.DateType) as c_int
+}
+
 #[inline(always)]
 pub unsafe fn PyDateTime_Check(op: *mut PyObject) -> c_int {
     PyObject_TypeCheck(op, PyDateTimeAPI.DateTimeType) as c_int
 }
 
 #[inline(always)]
-pub unsafe fn PyTZInfo_Check(op: *mut PyObject) -> c_int {
-    PyObject_TypeCheck(op, PyDateTimeAPI.TZInfoType) as c_int
+pub unsafe fn PyDateTime_CheckExact(op: *mut PyObject) -> c_int {
+    (Py_TYPE(op) == PyDateTimeAPI.DateTimeType) as c_int
 }
 
 #[inline(always)]
@@ -196,11 +201,31 @@ pub unsafe fn PyTime_Check(op: *mut PyObject) -> c_int {
     PyObject_TypeCheck(op, PyDateTimeAPI.TimeType) as c_int
 }
 
+#[inline(always)]
+pub unsafe fn PyTime_CheckExact(op: *mut PyObject) -> c_int {
+    (Py_TYPE(op) == PyDateTimeAPI.TimeType) as c_int
+}
+
 #[inline(always)]
 pub unsafe fn PyDelta_Check(op: *mut PyObject) -> c_int {
     PyObject_TypeCheck(op, PyDateTimeAPI.DeltaType) as c_int
 }
 
+#[inline(always)]
+pub unsafe fn PyDelta_CheckExact(op: *mut PyObject) -> c_int {
+    (Py_TYPE(op) == PyDateTimeAPI.DeltaType) as c_int
+}
+
+#[inline(always)]
+pub unsafe fn PyTZInfo_Check(op: *mut PyObject) -> c_int {
+    PyObject_TypeCheck(op, PyDateTimeAPI.TZInfoType) as c_int
+}
+
+#[inline(always)]
+pub unsafe fn PyTZInfo_CheckExact(op: *mut PyObject) -> c_int {
+    (Py_TYPE(op) == PyDateTimeAPI.TZInfoType) as c_int
+}
+
 //
 // Accessor functions
 //
diff --git a/tests/rustapi_module/tests/test_datetime.py b/tests/rustapi_module/tests/test_datetime.py
index 285ecb1f..93764f31 100644
--- a/tests/rustapi_module/tests/test_datetime.py
+++ b/tests/rustapi_module/tests/test_datetime.py
@@ -25,6 +25,13 @@ def get_timestamp(dt):
     return dt.timestamp()
 
 
+
+
+
+
+
+
+
 # Tests
 def test_date():
     assert rdt.make_date(2017, 9, 1) == pdt.date(2017, 9, 1)
@@ -224,3 +231,4 @@ def test_delta_accessors(td):
 def test_delta_err(args, err_type):
     with pytest.raises(err_type):
         rdt.make_delta(*args)
+
diff --git a/tests/test_datetime.rs b/tests/test_datetime.rs
new file mode 100644
index 00000000..deadb49e
--- /dev/null
+++ b/tests/test_datetime.rs
@@ -0,0 +1,126 @@
+#![feature(concat_idents)]
+
+extern crate pyo3;
+
+use pyo3::prelude::*;
+
+use pyo3::ffi::*;
+
+#[cfg(Py_3)]
+fn _get_subclasses<'p>(py: &'p Python, py_type: &str, args: &str) ->
+    (&'p PyObjectRef, &'p PyObjectRef, &'p PyObjectRef) {
+    macro_rules! unwrap_py {
+        ($e:expr) => { ($e).map_err(|e| e.print(*py)).unwrap() }
+    };
+
+    // Import the class from Python and create some subclasses
+    let datetime = unwrap_py!(py.import("datetime"));
+
+    let locals = PyDict::new(*py);
+    locals.set_item(py_type, datetime.get(py_type).unwrap())
+        .unwrap();
+
+    let make_subclass_py =
+        format!("class Subklass({}):\n    pass", py_type);
+
+    let make_sub_subclass_py =
+        "class SubSubklass(Subklass):\n    pass";
+
+    unwrap_py!(py.run(&make_subclass_py, None, Some(&locals)));
+    unwrap_py!(py.run(&make_sub_subclass_py, None, Some(&locals)));
+
+    // Construct an instance of the base class
+    let obj = unwrap_py!(
+        py.eval(&format!("{}({})", py_type, args), None, Some(&locals))
+    );
+
+    // Construct an instance of the subclass
+    let sub_obj = unwrap_py!(
+        py.eval(&format!("Subklass({})", args), None, Some(&locals))
+    );
+
+    // Construct an instance of the sub-subclass
+    let sub_sub_obj = unwrap_py!(
+        py.eval(&format!("SubSubklass({})", args), None, Some(&locals))
+    );
+
+    (obj, sub_obj, sub_sub_obj)
+}
+
+#[cfg(Py_3)]
+macro_rules! assert_check_exact {
+    ($check_func:ident, $obj: expr) => {
+        unsafe {
+            assert!($check_func(($obj).as_ptr()) != 0);
+            assert!(concat_idents!($check_func, Exact)(($obj).as_ptr()) != 0);
+        }
+    }
+}
+
+#[cfg(Py_3)]
+macro_rules! assert_check_only {
+    ($check_func:ident, $obj: expr) => {
+        unsafe {
+            assert!($check_func(($obj).as_ptr()) != 0);
+            assert!(concat_idents!($check_func, Exact)(($obj).as_ptr()) == 0);
+        }
+    }
+}
+
+
+#[test]
+#[cfg(Py_3)]
+fn test_date_check() {
+    let gil = Python::acquire_gil();
+    let py = gil.python();
+    let (obj, sub_obj, sub_sub_obj) = _get_subclasses(&py,
+        "date", "2018, 1, 1"
+        );
+
+    assert_check_exact!(PyDate_Check, obj);
+    assert_check_only!(PyDate_Check, sub_obj);
+    assert_check_only!(PyDate_Check, sub_sub_obj);
+}
+
+#[test]
+#[cfg(Py_3)]
+fn test_time_check() {
+    let gil = Python::acquire_gil();
+    let py = gil.python();
+    let (obj, sub_obj, sub_sub_obj) = _get_subclasses(&py,
+        "time", "12, 30, 15"
+        );
+
+    assert_check_exact!(PyTime_Check, obj);
+    assert_check_only!(PyTime_Check, sub_obj);
+    assert_check_only!(PyTime_Check, sub_sub_obj);
+}
+
+#[test]
+#[cfg(Py_3)]
+fn test_datetime_check() {
+    let gil = Python::acquire_gil();
+    let py = gil.python();
+    let (obj, sub_obj, sub_sub_obj) = _get_subclasses(&py,
+        "datetime", "2018, 1, 1, 13, 30, 15"
+        );
+
+    assert_check_only!(PyDate_Check, obj);
+    assert_check_exact!(PyDateTime_Check, obj);
+    assert_check_only!(PyDateTime_Check, sub_obj);
+    assert_check_only!(PyDateTime_Check, sub_sub_obj);
+}
+
+#[test]
+#[cfg(Py_3)]
+fn test_delta_check() {
+    let gil = Python::acquire_gil();
+    let py = gil.python();
+    let (obj, sub_obj, sub_sub_obj) = _get_subclasses(&py,
+        "timedelta", "1, -3"
+        );
+
+    assert_check_exact!(PyDelta_Check, obj);
+    assert_check_only!(PyDelta_Check, sub_obj);
+    assert_check_only!(PyDelta_Check, sub_sub_obj);
+}