diff --git a/spec/db-cars.cr b/spec/db-cars.cr
index d767bb5..d3cb462 100644
--- a/spec/db-cars.cr
+++ b/spec/db-cars.cr
@@ -28,6 +28,11 @@ class Car
 	def ==(other)
 		@name == other.name && @color == other.color && @keywords == other.keywords
 	end
+
+	# Equality is true if every property is identical.
+	def <=>(other)
+		@name <=> other.name
+	end
 end
 
 def ram_indexes(storage : DODB::Storage)
diff --git a/spec/test-cars.cr b/spec/test-cars.cr
index dc5cdd2..6df4c97 100644
--- a/spec/test-cars.cr
+++ b/spec/test-cars.cr
@@ -39,3 +39,46 @@ describe "uncached, cached and ram indexes" do
 		cars_ram2.rm_storage_dir
 	end
 end
+
+describe "tracking inconsistencies between implementations" do
+	it "index - partitions - tags" do
+		cars_ram0 = DODB::RAMOnlySpecDataBase(Car).new "-0"
+		cars_ram1 = DODB::RAMOnlySpecDataBase(Car).new "-1"
+		cars_ram2 = DODB::RAMOnlySpecDataBase(Car).new "-2"
+
+		uncached_searchby_name, uncached_searchby_color, uncached_searchby_keywords = uncached_indexes cars_ram0
+		cached_searchby_name, cached_searchby_color, cached_searchby_keywords = cached_indexes cars_ram1
+		ram_searchby_name, ram_searchby_color, ram_searchby_keywords = ram_indexes cars_ram2
+
+		add_cars cars_ram0, 1
+		add_cars cars_ram1, 1
+		add_cars cars_ram2, 1
+
+		# Searches should be consistent between all implementations of basic indexes, partitions and tags.
+
+		# Basic index.
+		uncached_corvet_car = uncached_searchby_color.get_with_keys? "Corvet-0"
+		cached_corvet_car   = cached_searchby_color.get_with_keys?   "Corvet-0"
+		ram_corvet_car      = ram_searchby_color.get_with_keys?      "Corvet-0"
+		uncached_corvet_car.should eq cached_corvet_car
+		uncached_corvet_car.should eq ram_corvet_car
+
+		# Partitions.
+		uncached_red_cars = uncached_searchby_color.get? "red"
+		cached_red_cars   = cached_searchby_color.get?   "red"
+		ram_red_cars      = ram_searchby_color.get?      "red"
+		uncached_red_cars.sort.should eq cached_red_cars.sort
+		uncached_red_cars.sort.should eq ram_red_cars.sort
+
+		# Tags.
+		uncached_fast_cars = uncached_searchby_keywords.get? "fast"
+		cached_fast_cars   = cached_searchby_keywords.get?   "fast"
+		ram_fast_cars      = ram_searchby_keywords.get?      "fast"
+		uncached_fast_cars.sort.should eq cached_fast_cars.sort
+		uncached_fast_cars.sort.should eq ram_fast_cars.sort
+
+		cars_ram0.rm_storage_dir
+		cars_ram1.rm_storage_dir
+		cars_ram2.rm_storage_dir
+	end
+end