diff --git a/test/cypress/tests/collaborative-editing/OperationExecutor.spec.ts b/test/cypress/tests/collaborative-editing/OperationExecutor.spec.ts
new file mode 100644
index 00000000..b8897a81
--- /dev/null
+++ b/test/cypress/tests/collaborative-editing/OperationExecutor.spec.ts
@@ -0,0 +1,9 @@
+describe('Operation Executor', () => {
+  it('should apply an Operation from OperationReceived event on Document State', () => {
+    console.log('todo');
+  });
+
+  it('should emit OperationApplied event on receiving new operation', () => {
+    console.log('todo');
+  });
+});
diff --git a/test/cypress/tests/collaborative-editing/OperationManager.spec.ts b/test/cypress/tests/collaborative-editing/OperationManager.spec.ts
new file mode 100644
index 00000000..7d96f63a
--- /dev/null
+++ b/test/cypress/tests/collaborative-editing/OperationManager.spec.ts
@@ -0,0 +1,53 @@
+describe('Operation Manager', () => {
+  /**
+   * Mock Private EventBus
+   *
+   *
+   */
+  describe('Local changes', () => {
+    it('should put new operation to the end of Pending OPs queue', () => {
+      console.log('todo');
+    });
+
+    it('should send first operation from the Pending OPs queue to the Server', () => {
+      console.log('todo');
+    });
+
+    it('should remove operation from the start of Pending OPs queue after Acknowledgement from the Server', () => {
+      console.log('todo');
+    });
+
+    it('should not send new operation to the Server if it\'s waiting for Acknowledgement from the Server', () => {
+      console.log('todo');
+    });
+
+    it('should receive Acknowledgement from the Server and put Operations from response to the Resolved OPs', () => {
+      console.log('todo');
+    });
+  });
+
+  describe('Received changes', () => {
+    it('should execute Transformer over Pending OPs relative to the received operation and put them back to the Pending OPs', () => {
+      console.log('todo');
+      // Think about how to check changes in the Pending OPs
+    });
+
+    it('should put received operation to the end of Resolved OPs', () => {
+      console.log('todo');
+    });
+
+    it('should emit an OperationReceived event with received operation to the Private EventBus', () => {
+      console.log('todo');
+    });
+  });
+
+  describe('Document Revision', () => {
+    it('should send current Document Revision with a new Operation', () => {
+      console.log('todo');
+    });
+
+    it('should set current Document Revision from received Operation', () => {
+      console.log('todo');
+    });
+  });
+});
diff --git a/test/cypress/tests/collaborative-editing/OperationObserver.spec.ts b/test/cypress/tests/collaborative-editing/OperationObserver.spec.ts
new file mode 100644
index 00000000..3634c919
--- /dev/null
+++ b/test/cypress/tests/collaborative-editing/OperationObserver.spec.ts
@@ -0,0 +1,25 @@
+describe('Operation Observer', () => {
+  /**
+   * Mock Public EventBus
+   * Mock previous state in Document State Store
+   *
+   * Act - emulate Change Event at Public EventBus
+   *
+   * Expect - Private EventBus got correct operation
+   */
+  it('should create INSERT operation when it receives a change event after adding data', () => {
+    console.log('todo');
+  });
+
+  it('should create DELETE operation when it receives a change event after removing data', () => {
+    console.log('todo');
+  });
+
+  it('should create DELETE and INSERT operations when it receives a change event after replacing data', () => {
+    console.log('todo');
+  });
+
+  it('should put new Document State to the store', () => {
+    console.log('todo');
+  });
+});
diff --git a/test/cypress/tests/collaborative-editing/operationExecutor.spec.ts b/test/cypress/tests/collaborative-editing/operationExecutor.spec.ts
deleted file mode 100644
index 97376948..00000000
--- a/test/cypress/tests/collaborative-editing/operationExecutor.spec.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-describe('Operation Executor', () => {
-  it('should change document state with received operation', () => {
-    console.log('todo');
-  });
-
-  it('should fire \'OperationApplied\' event on receiving new operation', () => {
-    console.log('todo');
-  });
-});
diff --git a/test/cypress/tests/collaborative-editing/operationManager.spec.ts b/test/cypress/tests/collaborative-editing/operationManager.spec.ts
deleted file mode 100644
index d60f4e5a..00000000
--- a/test/cypress/tests/collaborative-editing/operationManager.spec.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-describe('Operation Manager', () => {
-  describe('Local changes', () => {
-    it('should put new operation to the Pending OPs until sending to the server', () => {
-      console.log('todo');
-    });
-
-    it('should remove operation from the Pending OPs after sending to the server', () => {
-      console.log('todo');
-    });
-
-    it('should put received operation with acknowledgement to the Resolved OPs', () => {
-      console.log('todo');
-    });
-  });
-
-  describe('Received changes', () => {
-    it('should transform Pending OPs relative to the received operation', () => {
-      console.log('todo');
-    });
-
-    it('should put received operation to the private Event Bus', () => {
-      console.log('todo');
-    });
-
-    it('should put received operation to the Resolved OPs', () => {
-      console.log('todo');
-    });
-  });
-});
diff --git a/test/cypress/tests/collaborative-editing/operationObserver.spec.ts b/test/cypress/tests/collaborative-editing/operationObserver.spec.ts
deleted file mode 100644
index e3c0d827..00000000
--- a/test/cypress/tests/collaborative-editing/operationObserver.spec.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-describe('Operation Observer', () => {
-  it('should create operation by changes event from the public event bus', () => {
-    console.log('todo');
-  });
-});
diff --git a/test/cypress/tests/collaborative-editing/transform/Transformer.spec.ts b/test/cypress/tests/collaborative-editing/transform/Transformer.spec.ts
new file mode 100644
index 00000000..059eeaa1
--- /dev/null
+++ b/test/cypress/tests/collaborative-editing/transform/Transformer.spec.ts
@@ -0,0 +1,41 @@
+describe('Transformer', () => {
+  describe('Block Indices', () => {
+    it('should not transform the first Operation which index is less than index of the second Operation', () => {
+      console.log('todo');
+    });
+
+    it('should transform the first Operation which index is more than index of the second Operation', () => {
+      console.log('todo');
+    });
+  });
+
+  describe('Symbol Indices', () => {
+    it('should not transform the first Operation which index is less than index of the second Operation', () => {
+      console.log('todo');
+    });
+
+    it('should transform the first Operation which index is more than index of the second Operation', () => {
+      console.log('todo');
+    });
+  });
+
+  describe('Mixed Indices', () => {
+    it('should not transform the first Operation which block index is less than block index of the second Operation', () => {
+      console.log('todo');
+    });
+
+    it('should transform the first Operation which block index is more than block index of the second Operation', () => {
+      console.log('todo');
+    });
+  });
+
+  describe('Inverting Operation', () => {
+    it('should invert INSERT Operation to DELETE Operation', () => {
+      console.log('todo');
+    });
+
+    it('should invert DELETE Operation to INSERT Operation', () => {
+      console.log('todo');
+    });
+  });
+});
diff --git a/test/cypress/tests/collaborative-editing/transform/transformer.spec.ts b/test/cypress/tests/collaborative-editing/transform/transformer.spec.ts
deleted file mode 100644
index fca92284..00000000
--- a/test/cypress/tests/collaborative-editing/transform/transformer.spec.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-describe('Transformer', () => {
-  it('should transform the operation relative to the previous one', () => {
-    console.log('todo');
-  });
-});
diff --git a/test/cypress/tests/collaborative-editing/undoRedo/manager.spec.ts b/test/cypress/tests/collaborative-editing/undoRedo/Manager.spec.ts
similarity index 75%
rename from test/cypress/tests/collaborative-editing/undoRedo/manager.spec.ts
rename to test/cypress/tests/collaborative-editing/undoRedo/Manager.spec.ts
index 98a5d2a4..a151abba 100644
--- a/test/cypress/tests/collaborative-editing/undoRedo/manager.spec.ts
+++ b/test/cypress/tests/collaborative-editing/undoRedo/Manager.spec.ts
@@ -1,4 +1,7 @@
 describe('Undo Redo Manager', () => {
+  /**
+   * Need to draw work flow before describing tests
+   */
   it('should do \'UNDO\' operation', () => {
     console.log('todo');
   });