diff --git a/tests/store/test_page_size.py b/tests/store/test_page_size.py
index ee65453e..42cbea77 100644
--- a/tests/store/test_page_size.py
+++ b/tests/store/test_page_size.py
@@ -1,6 +1,9 @@
 import pytest
 from src.libs.common import to_base64
 from src.steps.store import StepsStore
+from src.libs.custom_logger import get_custom_logger
+
+logger = get_custom_logger(__name__)
 
 
 @pytest.mark.usefixtures("node_setup")
@@ -33,3 +36,31 @@ class TestPageSize(StepsStore):
         for node in self.store_nodes:
             store_response = self.get_messages_from_store(node, page_size=page_size)
             assert len(store_response.messages) == page_size, "Message count mismatch"
+
+    def test_extreme_number_page_size(self):
+        for i in range(150):
+            self.publish_message(message=self.create_message(payload=to_base64(f"Message_{i}")))
+        for node in self.store_nodes:
+            store_response = self.get_messages_from_store(node, page_size=1000000)
+            assert len(store_response.messages) == 100, "Message count mismatch"
+
+    def test_negative_number_page_size(self):
+        page_size = -1
+        for i in range(10):
+            self.publish_message(message=self.create_message(payload=to_base64(f"Message_{i}")))
+            logger.debug(f"requesting stored message with wrong page_size = {page_size}")
+        for node in self.store_nodes:
+            store_response = self.get_messages_from_store(node, page_size=page_size)
+            assert len(store_response.messages) == 10, "Message count mismatch"
+
+    def test_invalid_page_size(self):
+        page_size = "$2"
+        for i in range(10):
+            self.publish_message(message=self.create_message(payload=to_base64(f"Message_{i}")))
+        for node in self.store_nodes:
+            try:
+                store_response = self.get_messages_from_store(node, page_size=page_size)
+                raise Exception(f"invalid page number {page_size} was acepted !!")
+            except Exception as e:
+                logger.debug(f"the invalid page_size {page_size} wasn't accepted ")
+                assert e.args[0].find("400 Client Error: Bad Request for url"), "Error logged isn't for bad url"
diff --git a/tests/store/test_sorting.py b/tests/store/test_sorting.py
index 512e44b7..1e8373aa 100644
--- a/tests/store/test_sorting.py
+++ b/tests/store/test_sorting.py
@@ -1,6 +1,9 @@
 import pytest
 from src.libs.common import to_base64
 from src.steps.store import StepsStore
+from src.libs.custom_logger import get_custom_logger
+
+logger = get_custom_logger(__name__)
 
 
 @pytest.mark.usefixtures("node_setup")
@@ -21,3 +24,18 @@ class TestSorting(StepsStore):
                 assert response_message_hash_list == expected_message_hash_list[:5], "Message hash mismatch for acending order"
             else:
                 assert response_message_hash_list == expected_message_hash_list[5:], "Message hash mismatch for descending order"
+
+    def test_store_invalid_ascending(self):
+        expected_message_hash_list = []
+        ascending = "##"
+        for i in range(4):
+            message = self.create_message(payload=to_base64(f"Message_{i}"))
+            self.publish_message(message=message)
+            expected_message_hash_list.append(self.compute_message_hash(self.test_pubsub_topic, message))
+            logger.debug(f"requesting stored messages with invalid ascending ={ascending}")
+        for node in self.store_nodes:
+            store_response = self.get_messages_from_store(node, ascending=ascending, page_size=2)
+            response_message_hash_list = []
+            for index in range(len(store_response.messages)):
+                response_message_hash_list.append(store_response.message_hash(index))
+            assert response_message_hash_list == expected_message_hash_list[:2], "pages aren't forward as expected"