diff --git a/test/test_sparse_datastore.py b/test/test_sparse_datastore.py
new file mode 100644
index 000000000..409fc3e01
--- /dev/null
+++ b/test/test_sparse_datastore.py
@@ -0,0 +1,25 @@
+"""Test framers."""
+
+
+from pymodbus.datastore import ModbusSparseDataBlock
+
+
+def test_check_sparsedatastore():
+    """Test check frame."""
+    data_in_block = {
+        1: 6720,
+        2: 130,
+        30: [0x0D, 0xFE],
+        105: [1, 2, 3, 4],
+        20000: [45, 241, 48],
+        20008: 38,
+        48140: [0x4208, 0xCCCD],
+    }
+    datablock = ModbusSparseDataBlock(data_in_block)
+    for key, entry in data_in_block.items():
+        if isinstance(entry, int):
+            entry = [entry]
+        for value in entry:
+            assert datablock.validate(key, 1)
+            assert datablock.getValues(key, 1) == [value]
+            key += 1