diff --git a/packages/slate-history/test/undo/delete_backward/custom-prop.tsx b/packages/slate-history/test/undo/delete_backward/custom-prop.tsx
index e0e65ad36..00469db7c 100644
--- a/packages/slate-history/test/undo/delete_backward/custom-prop.tsx
+++ b/packages/slate-history/test/undo/delete_backward/custom-prop.tsx
@@ -18,5 +18,4 @@ export const input = (
     </block>
   </editor>
 )
-export const skip = true // TODO: see https://github.com/ianstormtaylor/slate/pull/4188
 export const output = cloneDeep(input)
diff --git a/packages/slate-history/test/undo/delete_backward/inline-across.tsx b/packages/slate-history/test/undo/delete_backward/inline-across.tsx
index 88b67ea6c..efe376d00 100644
--- a/packages/slate-history/test/undo/delete_backward/inline-across.tsx
+++ b/packages/slate-history/test/undo/delete_backward/inline-across.tsx
@@ -26,5 +26,4 @@ export const input = (
     </block>
   </editor>
 )
-export const skip = true // TODO: see https://github.com/ianstormtaylor/slate/pull/4188
 export const output = cloneDeep(input)
diff --git a/packages/slate-history/test/undo/insert_fragment/basic.tsx b/packages/slate-history/test/undo/insert_fragment/basic.tsx
index c9bc054a1..b26d4c610 100644
--- a/packages/slate-history/test/undo/insert_fragment/basic.tsx
+++ b/packages/slate-history/test/undo/insert_fragment/basic.tsx
@@ -35,4 +35,3 @@ export const input = (
   </editor>
 )
 export const output = cloneDeep(input)
-export const skip = true