diff --git a/Project.toml b/Project.toml
index d256c1b6f..f14f4ea8b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "ApproxFun"
 uuid = "28f2ccd6-bb30-5033-b560-165f7b14dc2f"
-version = "0.13.3"
+version = "0.13.4"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"
diff --git a/src/Extras/show.jl b/src/Extras/show.jl
index 8a392ed33..68327bcd6 100644
--- a/src/Extras/show.jl
+++ b/src/Extras/show.jl
@@ -132,9 +132,10 @@ function show(io::IO,ss::PiecewiseSpace)
     end
 end
 
-summary(ss::ArraySpace) = string(Base.dims2string(length.(axes(ss))), " ArraySpace")
+summarystr(ss::ArraySpace) = string(Base.dims2string(length.(axes(ss))), " ArraySpace")
+summary(io::IO, ss::ArraySpace) = print(io, summarystr(ss))
 function show(io::IO,ss::ArraySpace;header::Bool=true)
-    header && print(io,summary(ss)*":\n")
+    header && print(io,summarystr(ss)*":\n")
     show(io, ss.spaces)
 end
 
@@ -182,17 +183,18 @@ end
 
 ## Operator
 
-summary(B::Operator) =
-    string(typeof(B).name.name)*" : "*string(domainspace(B))*" → "*string(rangespace(B))
+summarystr(B::Operator) = string(typeof(B).name.name, " : ", domainspace(B), " → ", rangespace(B))
+summary(io::IO, B::Operator) = print(io, summarystr(B))
 
 struct PrintShow
     str
 end
 Base.show(io::IO,N::PrintShow) = print(io,N.str)
 
+show(io::IO, B::Operator) = summary(io, B)
 
-function show(io::IO,B::Operator;header::Bool=true)
-    header && println(io,summary(B))
+function show(io::IO, ::MIME"text/plain", B::Operator;header::Bool=true)
+    header && println(io, summarystr(B))
     dsp=domainspace(B)
 
     if !isambiguous(domainspace(B)) && (eltype(B) <: Number)
diff --git a/test/runtests.jl b/test/runtests.jl
index 0801d841d..16547c8d0 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -215,4 +215,16 @@ end
     N = u -> [u'(0), u(0)-1, x*u'' + 2*u' + x*u^n]
     u = newton(N, u₀) # perform Newton iteration in function space
     @test u(0.1) ≈ 0.9983370741307388
-end
\ No newline at end of file
+end
+
+@testset "show" begin
+    op = Derivative(Chebyshev())
+    io = IOBuffer()
+    @test summary(io, op) isa Nothing
+    @test contains(String(take!(io)), " : $(domainspace(op)) → $(rangespace(op))")
+    show(io, op)
+    @test contains(String(take!(io)), " : $(domainspace(op)) → $(rangespace(op))")
+
+    @test summary(io, ApproxFun.ArraySpace(Chebyshev(), 2)) isa Nothing
+    @test contains(String(take!(io)), "ArraySpace")
+end