diff --git a/Project.toml b/Project.toml
index dc2db46b..3a445d27 100644
--- a/Project.toml
+++ b/Project.toml
@@ -53,6 +53,7 @@ BlockBandedMatrices = "ffab5731-97b5-5995-9138-79e8c1846df0"
 CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
 ChainRules = "082447d4-558c-5d27-93f4-14fc19e9eca2"
 ComponentArrays = "b0b7db55-cfe3-40fc-9ded-d10e2dbeff66"
+FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"
 GPUArraysCore = "46192b85-c4d5-4398-a991-12ede77f4527"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
@@ -66,4 +67,4 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 Tracker = "9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c"
 
 [targets]
-test = ["SafeTestsets", "Pkg", "Test", "Aqua", "Random", "SparseArrays", "SuiteSparse", "BandedMatrices", "BlockBandedMatrices", "GPUArraysCore", "StaticArrays", "StaticArraysCore", "Tracker", "ReverseDiff", "ChainRules", "ComponentArrays"]
+test = ["SafeTestsets", "Pkg", "Test", "Aqua", "Random", "SparseArrays", "SuiteSparse", "BandedMatrices", "BlockBandedMatrices", "GPUArraysCore", "StaticArrays", "StaticArraysCore", "Tracker", "ReverseDiff", "ChainRules", "FillArrays", "ComponentArrays"]
diff --git a/test/blockbandedmatrices.jl b/test/blockbandedmatrices.jl
index 9f29716d..5f158868 100644
--- a/test/blockbandedmatrices.jl
+++ b/test/blockbandedmatrices.jl
@@ -1,11 +1,12 @@
 
 using ArrayInterface
 using BlockBandedMatrices
+using FillArrays
 using Test
 
 BB=BlockBandedMatrix(Ones(10,10),[1,2,3,4],[4,3,2,1],(1,0))
-BB[Block(1,1)].=[1 2 3 4]
-BB[Block(2,1)].=[5 6 7 8;9 10 11 12]
+BB[BlockBandedMatrices.Block(1,1)].=[1 2 3 4]
+BB[BlockBandedMatrices.Block(2,1)].=[5 6 7 8;9 10 11 12]
 rowind,colind=ArrayInterface.findstructralnz(BB)
 @test [BB[rowind[i],colind[i]] for i in 1:length(rowind)]==
     [1,5,9,2,6,10,3,7,11,4,8,12,