diff --git a/Source/Common/IGListExperiments.h b/Source/Common/IGListExperiments.h
index cb42c666..dc625100 100644
--- a/Source/Common/IGListExperiments.h
+++ b/Source/Common/IGListExperiments.h
@@ -20,8 +20,6 @@ typedef NS_OPTIONS (NSInteger, IGListExperiment) {
     IGListExperimentBackgroundDiffing = 1 << 2,
     /// Test fallback to reloadData when "too many" update operations.
     IGListExperimentReloadDataFallback = 1 << 3,
-    /// Test deduping item-level updates.
-    IGListExperimentDedupeItemUpdates = 1 << 5,
     /// Test deferring object creation until just before diffing.
     IGListExperimentDeferredToObjectCreation = 1 << 6,
     /// Test getting collection view at update time.
diff --git a/Source/IGListAdapterUpdater.m b/Source/IGListAdapterUpdater.m
index 90e8be4e..eac64593 100644
--- a/Source/IGListAdapterUpdater.m
+++ b/Source/IGListAdapterUpdater.m
@@ -334,11 +334,6 @@ void convertReloadToDeleteInsert(NSMutableIndexSet *reloads,
     [itemDeletes addObjectsFromArray:[reloadDeletePaths allObjects]];
     [itemInserts addObjectsFromArray:[reloadInsertPaths allObjects]];
 
-    if (IGListExperimentEnabled(self.experiments, IGListExperimentDedupeItemUpdates)) {
-        itemDeletes = [[[NSSet setWithArray:itemDeletes] allObjects] mutableCopy];
-        itemInserts = [[[NSSet setWithArray:itemInserts] allObjects] mutableCopy];
-    }
-
     IGListBatchUpdateData *updateData = [[IGListBatchUpdateData alloc] initWithInsertSections:inserts
                                                                                deleteSections:deletes
                                                                                  moveSections:moves
diff --git a/Tests/IGListAdapterE2ETests.m b/Tests/IGListAdapterE2ETests.m
index d16fadce..7c91d173 100644
--- a/Tests/IGListAdapterE2ETests.m
+++ b/Tests/IGListAdapterE2ETests.m
@@ -1785,25 +1785,6 @@
     [self waitForExpectationsWithTimeout:30 handler:nil];
 }
 
-- (void)test_whenInsertingItemTwice_withDedupeExperiment_thatSecondInsertGetsDropped {
-    ((IGListAdapterUpdater*)self.updater).experiments = IGListExperimentDedupeItemUpdates;
-
-    IGTestObject *object = genTestObject(@1, @1);
-    [self setupWithObjects:@[object]];
-
-    IGTestDelegateController *controller = [self.adapter sectionControllerForObject:self.dataSource.objects.firstObject];
-    XCTestExpectation *expectation = genExpectation;
-    [controller.collectionContext performBatchAnimated:YES updates:^(id<IGListBatchContext>  _Nonnull batchContext) {
-        object.value = @2;
-        [batchContext insertInSectionController:controller atIndexes:[NSIndexSet indexSetWithIndex:0]];
-        [batchContext insertInSectionController:controller atIndexes:[NSIndexSet indexSetWithIndex:0]];
-    } completion:^(BOOL finished) {
-        [expectation fulfill];
-    }];
-
-    [self waitForExpectationsWithTimeout:30 handler:nil];
-}
-
 - (void)test_whenModifyingInitialAndFinalAttribute_thatLayoutIsCorrect {
     // set up the custom layout
     IGListCollectionViewLayout *layout = [[IGListCollectionViewLayout alloc] initWithStickyHeaders:NO topContentInset:0 stretchToEdge:YES];