diff --git a/src/operators/multipliedoperator.jl b/src/operators/multipliedoperator.jl
index d4220206..42ad81ac 100644
--- a/src/operators/multipliedoperator.jl
+++ b/src/operators/multipliedoperator.jl
@@ -63,4 +63,6 @@ Base.:*(x::MultipliedOperator, v) = x(v);
 
 # don't know a better place to put this
 # environment for MultipliedOperator
-environments(st,x::MultipliedOperator,args...;kwargs...) = environments(st,x.op,args...;kwargs...)
+function environments(st, x::MultipliedOperator, args...; kwargs...)
+    return environments(st, x.op, args...; kwargs...)
+end
diff --git a/test/algorithms.jl b/test/algorithms.jl
index a25d7190..04df376f 100644
--- a/test/algorithms.jl
+++ b/test/algorithms.jl
@@ -147,9 +147,9 @@ end
     alg = TDVP()
 
     # with regular MPOHamiltonian
-    H0left   =  simpleH;
-    H0middle =  repeat(  simpleH, 20);
-    H0right  =  simpleH;
+    H0left = simpleH
+    H0middle = repeat(simpleH, 20)
+    H0right = simpleH
 
     Ψ = InfiniteMPS([ℂ^2], [ℂ^20])
     Ψwindow = WindowMPS(Ψ, 20)
diff --git a/test/states.jl b/test/states.jl
index 3d9e857e..4daf8d6b 100644
--- a/test/states.jl
+++ b/test/states.jl
@@ -219,7 +219,7 @@ end
         period = rand(1:4)
         Ψ = InfiniteMPS(fill(d, period), fill(D, period))
 
-        Ψwindow = WindowMPS(rand, ComplexF64, rand(5:10), d, D, Ψ, Ψ); # version that does not copy
+        Ψwindow = WindowMPS(rand, ComplexF64, rand(5:10), d, D, Ψ, Ψ) # version that does not copy
         @test Ψwindow.left_gs === Ψwindow.right_gs # the same reference
 
         Ψwindow_copied = copy(Ψwindow)