diff --git a/test/concrete_generators.jl b/test/concrete_generators.jl
index 4de0807..494b42e 100644
--- a/test/concrete_generators.jl
+++ b/test/concrete_generators.jl
@@ -4,18 +4,18 @@
         def_T = Float64
 
         Types_changed = [Bool, Int8, Int16, Int32, Int64, Int128, UInt8, UInt16, UInt32, UInt64, UInt128]
-        Typtes_unchanged = [ComplexF32, ComplexF64, Complex{Int}, Float32, Float64]
+        Types_unchanged = [ComplexF32, ComplexF64, Complex{Int}, Float32, Float64]
 
         for T in Types_changed
             IndexFunArrays.default_type(T, Float64) = Float64
             for T2 in Types_changed
-                IndexFunArrays.default_type(T, def_T2) = def_T
+                @test IndexFunArrays.default_type(T, def_T) == def_T
             end
         end
         
-        for T in Types_changed
+        for T in Types_unchanged
             for T2 in Types_changed
-                IndexFunArrays.default_type(T, T2) = T
+                @test IndexFunArrays.default_type(T, T2) == T
             end
         end
     end