diff --git a/src/pybind/rados/rados.pyx b/src/pybind/rados/rados.pyx
index 1f2a049a68a..f70fb723e64 100644
--- a/src/pybind/rados/rados.pyx
+++ b/src/pybind/rados/rados.pyx
@@ -2799,7 +2799,9 @@ returned %d, but should return zero on success." % (self.name, ret))
             int _flags = flags
 
         with nogil:
-            rados_write_op_operate(_write_op.write_op, self.io, _oid, &_mtime, _flags)
+            ret = rados_write_op_operate(_write_op.write_op, self.io, _oid, &_mtime, _flags)
+        if (ret != 0):
+            raise make_ex(ret, "Failed to operate write op for oid %s" % oid)
 
     @requires(('read_op', ReadOp), ('oid', str_type), ('flag', opt(int)))
     def operate_read_op(self, read_op, oid, flag=LIBRADOS_OPERATION_NOFLAG):
@@ -2819,7 +2821,9 @@ returned %d, but should return zero on success." % (self.name, ret))
             int _flag = flag
 
         with nogil:
-            rados_read_op_operate(_read_op.read_op, self.io, _oid, _flag)
+            ret = rados_read_op_operate(_read_op.read_op, self.io, _oid, _flag)
+        if (ret != 0):
+            raise make_ex(ret, "Failed to operate read op for oid %s" % oid)
 
     @requires(('read_op', ReadOp), ('start_after', str_type), ('filter_prefix', str_type), ('max_return', int))
     def get_omap_vals(self, read_op, start_after, filter_prefix, max_return):
@@ -2871,7 +2875,7 @@ returned %d, but should return zero on success." % (self.name, ret))
             ReadOp _read_op = read_op
             rados_omap_iter_t iter_addr = NULL
             int _max_return = max_return
-            int prval
+            int prval = 0
 
         with nogil:
             rados_read_op_omap_get_keys(_read_op.read_op, _start_after,
@@ -2896,7 +2900,7 @@ returned %d, but should return zero on success." % (self.name, ret))
             rados_omap_iter_t iter_addr
             char **_keys = to_bytes_array(keys)
             size_t key_num = len(keys)
-            int prval
+            int prval = 0
 
         try:
             with nogil:
diff --git a/src/test/pybind/test_rados.py b/src/test/pybind/test_rados.py
index 73ec2e33b52..03cf2dd7a14 100644
--- a/src/test/pybind/test_rados.py
+++ b/src/test/pybind/test_rados.py
@@ -447,16 +447,19 @@ class TestIoctx(object):
             self.ioctx.operate_write_op(write_op, "hw")
         with ReadOpCtx(self.ioctx) as read_op:
             iter, ret = self.ioctx.get_omap_vals(read_op, "", "", 4)
+            eq(ret, 0)
             self.ioctx.operate_read_op(read_op, "hw")
             next(iter)
             eq(list(iter), [("2", b"bbb"), ("3", b"ccc"), ("4", b"\x04\x04\x04\x04")])
         with ReadOpCtx(self.ioctx) as read_op:
             iter, ret = self.ioctx.get_omap_vals(read_op, "2", "", 4)
+            eq(ret, 0)
             self.ioctx.operate_read_op(read_op, "hw")
             eq(("3", b"ccc"), next(iter))
             eq(list(iter), [("4", b"\x04\x04\x04\x04")])
         with ReadOpCtx(self.ioctx) as read_op:
             iter, ret = self.ioctx.get_omap_vals(read_op, "", "2", 4)
+            eq(ret, 0)
             self.ioctx.operate_read_op(read_op, "hw")
             eq(list(iter), [("2", b"bbb")])
 
@@ -468,8 +471,14 @@ class TestIoctx(object):
             self.ioctx.operate_write_op(write_op, "hw")
         with ReadOpCtx(self.ioctx) as read_op:
             iter, ret = self.ioctx.get_omap_vals_by_keys(read_op,("3","4",))
+            eq(ret, 0)
             self.ioctx.operate_read_op(read_op, "hw")
             eq(list(iter), [("3", b"ccc"), ("4", b"\x04\x04\x04\x04")])
+        with ReadOpCtx(self.ioctx) as read_op:
+            iter, ret = self.ioctx.get_omap_vals_by_keys(read_op,("3","4",))
+            eq(ret, 0)
+            with assert_raises(ObjectNotFound):
+                self.ioctx.operate_read_op(read_op, "no_such")
 
     def test_get_omap_keys(self):
         keys = ("1", "2", "3")
@@ -479,8 +488,14 @@ class TestIoctx(object):
             self.ioctx.operate_write_op(write_op, "hw")
         with ReadOpCtx(self.ioctx) as read_op:
             iter, ret = self.ioctx.get_omap_keys(read_op,"",2)
+            eq(ret, 0)
             self.ioctx.operate_read_op(read_op, "hw")
             eq(list(iter), [("1", None), ("2", None)])
+        with ReadOpCtx(self.ioctx) as read_op:
+            iter, ret = self.ioctx.get_omap_keys(read_op,"",2)
+            eq(ret, 0)
+            with assert_raises(ObjectNotFound):
+                self.ioctx.operate_read_op(read_op, "no_such")
 
     def test_clear_omap(self):
         keys = ("1", "2", "3")
@@ -493,6 +508,7 @@ class TestIoctx(object):
             self.ioctx.operate_write_op(write_op_1, "hw")
         with ReadOpCtx(self.ioctx) as read_op:
             iter, ret = self.ioctx.get_omap_vals_by_keys(read_op,("1",))
+            eq(ret, 0)
             self.ioctx.operate_read_op(read_op, "hw")
             eq(list(iter), [])