diff --git a/test/test_check_size.jl b/test/test_check_size.jl
index 9ef7dbc1..fec27bc5 100644
--- a/test/test_check_size.jl
+++ b/test/test_check_size.jl
@@ -33,7 +33,7 @@ ds["w"][:,1:15] = ones(10,15)
 @test size(ds["w"]) == (10,15)
 
 # w cannot grow along a fixed dimension
-@test_throws DimensionMismatch ds["w"][:,:] = ones(11,15)
+@test_throws Union{NCDatasets.NetCDFError,DimensionMismatch} ds["w"][:, :] = ones(11, 15)
 
 # NetCDF: Index exceeds dimension bound
 @test_throws Union{NCDatasets.NetCDFError,BoundsError} ds["u"][100,100]
diff --git a/test/test_variable.jl b/test/test_variable.jl
index ad016860..7b07ceab 100644
--- a/test/test_variable.jl
+++ b/test/test_variable.jl
@@ -20,7 +20,7 @@ NCDataset(filename,"c") do ds
 
     v = defVar(ds,"small",Float64,("lon","lat"))
 #    @test_throws Union{NCDatasets.NetCDFError,DimensionMismatch} v[:] = zeros(sz[1]+1,sz[2])
-    @test_throws DimensionMismatch v[1:sz[1],1:sz[2]] = zeros(sz[1]+1,sz[2])
+    @test_throws Union{NCDatasets.NetCDFError,DimensionMismatch} v[1:sz[1],1:sz[2]] = zeros(sz[1]+1,sz[2])
     @test_throws NCDatasets.NetCDFError v[sz[1]+1,1] = 1
     @test_throws NCDatasets.NetCDFError v[-1,1] = 1