diff --git a/test/ArrayDictionary.jl b/test/ArrayDictionary.jl
index 75d81b7..668f72d 100644
--- a/test/ArrayDictionary.jl
+++ b/test/ArrayDictionary.jl
@@ -40,14 +40,9 @@
     @test !isempty(d)
     @test isequal(copy(d), d)
     @test_throws IndexError insert!(d, 10, 12)
-    @test d[10] == 11
-    set!(d, 10, 12)
-    @test length(d) == setwith!(+, d, 10.0, 2.0)
+    @test d[10.0] == 11
+    set!(d, 10.0, 12.0)
     @test length(d) == 1
-    @test d[10] == 14
-    setwith!(+, d, 2.0, 2.0)
-    @test length(d) == 2
-    @test d[2] == 2
     @test d[10] == 12
     setwith!(+, d, 10.0, 2.0)
     @test length(d) == 1
@@ -55,8 +50,9 @@
     setwith!(+, d, 2.0, 2.0)
     @test length(d) == 2
     @test d[2] == 2
-    d[10] = 13
-    @test length(d) == 2
+    delete!(d, 2)
+    @test length(d) == 1
+    d[10.0] = 13.0
     @test d[10] == 13
     io = IOBuffer(); print(io, d); @test String(take!(io)) == "{10 = 13}"
     if VERSION < v"1.6-"
diff --git a/test/Dictionary.jl b/test/Dictionary.jl
index d06e85f..87085ed 100644
--- a/test/Dictionary.jl
+++ b/test/Dictionary.jl
@@ -100,8 +100,9 @@
     setwith!(+, d, 2.0, 2.0)
     @test length(d) == 2
     @test d[2] == 2
+    delete!(d, 2)
+    @test length(d) == 1
     d[10.0] = 13.0
-    @test length(d) == 2
     @test d[10] == 13
     io = IOBuffer(); print(io, d); @test String(take!(io)) == "{10 = 13}"
     if VERSION < v"1.6-"
diff --git a/test/UnorderedDictionary.jl b/test/UnorderedDictionary.jl
index db7947e..58f3b5e 100644
--- a/test/UnorderedDictionary.jl
+++ b/test/UnorderedDictionary.jl
@@ -78,8 +78,9 @@
     setwith!(+, d, 2.0, 2.0)
     @test length(d) == 2
     @test d[2] == 2
+    delete!(d, 2)
+    @test length(d) == 1
     d[10.0] = 13.0
-    @test length(d) == 2
     @test d[10] == 13
     io = IOBuffer(); print(io, d); @test String(take!(io)) == "{10 = 13}"
     if VERSION < v"1.6-"