diff --git a/test_tjnetwork.py b/test_tjnetwork.py
index 0aab61e..6faee5c 100644
--- a/test_tjnetwork.py
+++ b/test_tjnetwork.py
@@ -249,33 +249,18 @@ class TestApi:
 
         open_project(p)
 
-        nls : list[tuple[str, str]] = []
-
         nodes = get_nodes(p)
-        for node in nodes:
-            nls.append(('node', node))
-
         links = get_links(p)
 
         for _ in range(10):
-            random.shuffle(nls)
-            for nl in nls:
-                if nl[0] == 'node':
-                    node = nl[1]
-                    if is_junction(p, node):
-                        delete_junction(p, ChangeSet({'id': node}))
-                    if is_reservoir(p, node):
-                        delete_reservoir(p, ChangeSet({'id': node}))
-                    if is_tank(p, node):
-                        delete_tank(p, ChangeSet({'id': node}))
-                else:
-                    link = nl[1]
-                    if is_pipe(p, link):
-                        delete_pipe(p, ChangeSet({'id': link}))
-                    if is_pump(p, link):
-                        delete_pump(p, ChangeSet({'id': link}))
-                    if is_valve(p, link):
-                        delete_valve(p, ChangeSet({'id': link}))
+            random.shuffle(nodes)
+            for node in nodes:
+                if is_junction(p, node):
+                    delete_junction(p, ChangeSet({'id': node}))
+                if is_reservoir(p, node):
+                    delete_reservoir(p, ChangeSet({'id': node}))
+                if is_tank(p, node):
+                    delete_tank(p, ChangeSet({'id': node}))
 
             for node in nodes:
                 assert is_node(p, node) == False
@@ -302,33 +287,99 @@ class TestApi:
 
         open_project(p)
 
-        nls : list[tuple[str, str]] = []
-
         nodes = get_nodes(p)
-
         links = get_links(p)
-        for link in links:
-            nls.append(('link', link))
 
         for _ in range(10):
-            random.shuffle(nls)
-            for nl in nls:
-                if nl[0] == 'node':
-                    node = nl[1]
-                    if is_junction(p, node):
-                        delete_junction(p, ChangeSet({'id': node}))
-                    if is_reservoir(p, node):
-                        delete_reservoir(p, ChangeSet({'id': node}))
-                    if is_tank(p, node):
-                        delete_tank(p, ChangeSet({'id': node}))
-                else:
-                    link = nl[1]
-                    if is_pipe(p, link):
-                        delete_pipe(p, ChangeSet({'id': link}))
-                    if is_pump(p, link):
-                        delete_pump(p, ChangeSet({'id': link}))
-                    if is_valve(p, link):
-                        delete_valve(p, ChangeSet({'id': link}))
+            random.shuffle(links)
+            for link in links:
+                if is_pipe(p, link):
+                    delete_pipe(p, ChangeSet({'id': link}))
+                if is_pump(p, link):
+                    delete_pump(p, ChangeSet({'id': link}))
+                if is_valve(p, link):
+                    delete_valve(p, ChangeSet({'id': link}))
+
+            for node in nodes:
+                assert is_node(p, node)
+            for link in links:
+                assert is_link(p, link) == False
+
+            assert get_links(p) == []
+
+            op = get_restore_operation(p)
+            pick_operation(p, op)
+
+            for node in nodes:
+                assert is_node(p, node)
+            for link in links:
+                assert is_link(p, link)
+
+        self.leave(p)
+
+
+    def test_delete_nodes_then_restore_commands(self):
+        p = 'test_delete_nodes_then_restore_commands'
+        read_inp(p, f'./inp/net3.inp', '2')
+
+        open_project(p)
+
+        nodes = get_nodes(p)
+        links = get_links(p)
+
+        for _ in range(10):
+            random.shuffle(nodes)
+
+            batch = ChangeSet()
+            for node in nodes:
+                if is_junction(p, node):
+                    batch.delete({'type' : 'junction', 'id': node })
+                if is_reservoir(p, node):
+                    batch.delete({'type' : 'reservoir', 'id': node })
+                if is_tank(p, node):
+                    batch.delete({'type' : 'tank', 'id': node })
+            execute_batch_commands(p, batch)
+
+            for node in nodes:
+                assert is_node(p, node) == False
+            for link in links:
+                assert is_link(p, link) == False
+
+            assert get_nodes(p) == []
+            assert get_links(p) == []
+
+            op = get_restore_operation(p)
+            pick_operation(p, op)
+
+            for node in nodes:
+                assert is_node(p, node)
+            for link in links:
+                assert is_link(p, link)
+
+        self.leave(p)
+
+
+    def test_delete_links_then_restore_commands(self):
+        p = 'test_delete_links_then_restore_commands'
+        read_inp(p, f'./inp/net3.inp', '2')
+
+        open_project(p)
+
+        nodes = get_nodes(p)
+        links = get_links(p)
+
+        for _ in range(10):
+            random.shuffle(links)
+
+            batch = ChangeSet()
+            for link in links:
+                if is_pipe(p, link):
+                    batch.delete({'type' : 'pipe', 'id': link })
+                if is_pump(p, link):
+                    batch.delete({'type' : 'pump', 'id': link })
+                if is_valve(p, link):
+                    batch.delete({'type' : 'valve', 'id': link })
+            execute_batch_commands(p, batch)
 
             for node in nodes:
                 assert is_node(p, node)