diff --git a/test_avl.py b/test_avl.py
index b802b73..b28a3d9 100644
--- a/test_avl.py
+++ b/test_avl.py
@@ -116,58 +116,12 @@ def test_rotate(values):
         assert tree.is_correct
 
 
-@hypothesis.settings(max_examples=10000, deadline=None)
-@hypothesis.given(values=st.sets(st.integers()))
-def test_insert_random(values):
-    tree = AVLTree()
-
-    for value in values:
-        tree.insert(value)
-        assert tree.is_correct
-        assert tree.search(value) is not None
-
-
-@st.composite
-def delete_strategy(draw):
-    values = list(draw(st.sets(st.integers())))
-    delete_order = values.copy()
-    random.shuffle(delete_order)
-    return (values, delete_order)
-
-
 def _report(t_before: str, t_after: str) -> None:
     with open("before.dot", "w") as before, open("after.dot", "w") as after:
         print(t_before, file=before)
         print(t_after, file=after)
 
 
-@hypothesis.settings(max_examples=10000, deadline=None)
-@hypothesis.given(config=delete_strategy())
-def test_delete_random(config):
-    values, delete_order = config
-
-    tree = AVLTree()
-
-    for value in values:
-        tree.insert(value)
-
-    for value in delete_order:
-        before = str(tree)
-        tree.delete(value)
-        after = str(tree)
-
-        try:
-            assert tree.is_correct
-        except AssertionError:
-            logger.info(
-                f"[FAIL] Delete {value} from {values} in order {delete_order}"
-            )
-            _report(before, after)
-            logger.info(f"Before:\n{before}")
-            logger.info(f"After:\n{after}")
-            raise
-
-
 # @unittest.skip("Only for replicating hypothesis")
 @pytest.mark.parametrize(
     "values, delete_order",
diff --git a/test_generate.py b/test_generate.py
index d9df2bc..a573115 100644
--- a/test_generate.py
+++ b/test_generate.py
@@ -1,7 +1,7 @@
 from avl import AVLTree
 from wavl import WAVLTree
 from comparator import Comparator
-from test_wavl import delete_strategy
+from test_properties import delete_strategy
 
 import hypothesis
 import pytest
diff --git a/test_properties.py b/test_properties.py
new file mode 100644
index 0000000..20a75cb
--- /dev/null
+++ b/test_properties.py
@@ -0,0 +1,76 @@
+from avl import AVLTree
+from wavl import WAVLTree
+from ravl import RAVLTree
+
+import logging
+import random
+from typing import List
+
+import hypothesis
+import hypothesis.strategies as st
+import pytest
+
+logger = logging.getLogger(__name__)
+
+
+@pytest.mark.parametrize(
+    ("RankBalancedTree"),
+    [AVLTree, WAVLTree, RAVLTree]
+)
+@hypothesis.settings(max_examples=10000)
+@hypothesis.given(values=st.sets(st.integers()))
+def test_insert_random(RankBalancedTree, values):
+    tree = RankBalancedTree()
+
+    for value in values:
+        tree.insert(value)
+        assert tree.is_correct
+        assert tree.search(value) is not None
+
+    assert all(tree.search(key) is not None for key in values)
+
+
+@st.composite
+def delete_strategy(draw):
+    values = list(draw(st.sets(st.integers())))
+    delete_order = values.copy()
+    random.shuffle(delete_order)
+    return (values, delete_order)
+
+
+def _report(t_before: str, t_after: str) -> None:
+    with open("before.dot", "w") as before, open("after.dot", "w") as after:
+        print(t_before, file=before)
+        print(t_after, file=after)
+
+
+@pytest.mark.parametrize(
+    ("RankBalancedTree"),
+    [AVLTree, WAVLTree, RAVLTree]
+)
+@hypothesis.settings(max_examples=10000)
+@hypothesis.given(config=delete_strategy())
+def test_delete_random(RankBalancedTree, config):
+    values, delete_order = config
+
+    tree = RankBalancedTree()
+
+    for value in values:
+        tree.insert(value)
+
+    for value in delete_order:
+        before = str(tree)
+        tree.delete(value)
+        after = str(tree)
+
+        try:
+            assert tree.is_correct
+            assert tree.search(value) is None
+        except AssertionError:
+            logger.info(
+                f"[FAIL] Delete {value} from {values} in order {delete_order}"
+            )
+            _report(before, after)
+            logger.info(f"Before:\n{before}")
+            logger.info(f"After:\n{after}")
+            raise
diff --git a/test_ravl.py b/test_ravl.py
index 56ad51c..3e02490 100644
--- a/test_ravl.py
+++ b/test_ravl.py
@@ -70,64 +70,3 @@ def test_promote():
     for value in (0, 1, -1):
         tree.insert(value)
         assert tree.is_correct
-
-
-@pytest.mark.parametrize(
-    "values",
-    [
-        [0, 1, -2, -1, -3],
-        [0, 1, -2, -1, -3, -4, 4, 9, 7],
-        [0, 1, -2, -1, -3, -4, 4, 9, 7, 5, -5, 8],
-    ],
-)
-def test_rotate(values):
-    tree = RAVLTree()
-
-    for value in values:
-        tree.insert(value)
-        assert tree.is_correct
-
-
-@hypothesis.settings(max_examples=10000, deadline=None)
-@hypothesis.given(values=st.sets(st.integers()))
-def test_insert_random(values):
-    tree = RAVLTree()
-
-    for value in values:
-        tree.insert(value)
-        assert tree.is_correct
-        assert tree.search(value) is not None
-
-
-@st.composite
-def delete_strategy(draw):
-    values = list(draw(st.sets(st.integers())))
-    delete_order = values.copy()
-    random.shuffle(delete_order)
-    return (values, delete_order)
-
-
-@hypothesis.settings(max_examples=10000, deadline=None)
-@hypothesis.given(config=delete_strategy())
-def test_delete_random(config):
-    values, delete_order = config
-
-    tree = RAVLTree()
-
-    for value in values:
-        tree.insert(value)
-
-    for value in delete_order:
-        before = str(tree)
-        tree.delete(value)
-        after = str(tree)
-
-        try:
-            assert tree.is_correct
-        except AssertionError:
-            logger.info(
-                f"[FAIL] Delete {value} from {values} in order {delete_order}"
-            )
-            logger.info(f"Before:\n{before}")
-            logger.info(f"After:\n{after}")
-            raise
diff --git a/test_wavl.py b/test_wavl.py
index 340fc3c..c943df4 100644
--- a/test_wavl.py
+++ b/test_wavl.py
@@ -4,7 +4,6 @@ import hypothesis
 import hypothesis.strategies as st
 import logging
 import pytest
-import random
 
 logger = logging.getLogger(__name__)
 
@@ -88,25 +87,6 @@ def test_rotate(values):
         assert tree.is_correct
 
 
-@hypothesis.settings(max_examples=10000, deadline=None)
-@hypothesis.given(values=st.sets(st.integers()))
-def test_insert_random(values):
-    tree = WAVLTree()
-
-    for value in values:
-        tree.insert(value)
-        assert tree.is_correct
-        assert tree.search(value) is not None
-
-    for value in values:
-        assert tree.search(value) is not None
-
-
-def test_search_empty():
-    tree = WAVLTree()
-    assert tree.search(0) is None
-
-
 @hypothesis.given(values=st.sets(st.integers()))
 def test_search_random(values):
     tree = WAVLTree()
@@ -119,41 +99,6 @@ def test_search_random(values):
         assert tree.search(value) is not None
 
 
-@st.composite
-def delete_strategy(draw):
-    values = list(draw(st.sets(st.integers())))
-    delete_order = values.copy()
-    random.shuffle(delete_order)
-    return (values, delete_order)
-
-
-@hypothesis.settings(max_examples=10000, deadline=None)
-@hypothesis.given(config=delete_strategy())
-def test_delete_random(config):
-    values, delete_order = config
-
-    tree = WAVLTree()
-
-    for value in values:
-        tree.insert(value)
-
-    for value in delete_order:
-        before = str(tree)
-        tree.delete(value)
-        after = str(tree)
-
-        try:
-            assert tree.search(value) is None
-            assert tree.is_correct
-        except AssertionError:
-            logger.info(
-                f"[FAIL] Delete {value} from {values} in order {delete_order}"
-            )
-            logger.info(f"Before:\n{before}")
-            logger.info(f"After:\n{after}")
-            raise
-
-
 # @unittest.skip("Only for replicating hypothesis")
 @pytest.mark.parametrize(
     "values, delete_order",