diff --git a/test/symmetries/singletree.jl b/test/symmetries/singletree.jl
index cabb7dd74..7ca92c919 100644
--- a/test/symmetries/singletree.jl
+++ b/test/symmetries/singletree.jl
@@ -16,16 +16,16 @@ using TensorKitSectors
     N = 5
     out = random_fusion(I, Val(N))
     isdual = ntuple(n -> rand(Bool), N)
-    in = rand(collect(⊗(out...)))
-    numtrees = length(fusiontrees(out, in, isdual))
-    @test numtrees == count(n -> true, fusiontrees(out, in, isdual))
-    while !(0 < numtrees < 30) && !(one(in) in ⊗(out...))
+    coupled = rand(collect(⊗(out...)))
+    numtrees = length(fusiontrees(out, coupled, isdual))
+    @test numtrees == count(n -> true, fusiontrees(out, coupled, isdual))
+    while !(0 < numtrees < 30) && !(one(coupled) in ⊗(out...))
         out = ntuple(n -> randsector(I), N)
-        in = rand(collect(⊗(out...)))
-        numtrees = length(fusiontrees(out, in, isdual))
-        @test numtrees == count(n -> true, fusiontrees(out, in, isdual))
+        coupled = rand(collect(⊗(out...)))
+        numtrees = length(fusiontrees(out, coupled, isdual))
+        @test numtrees == count(n -> true, fusiontrees(out, coupled, isdual))
     end
-    it = @constinferred fusiontrees(out, in, isdual)
+    it = @constinferred fusiontrees(out, coupled, isdual)
     @constinferred Nothing iterate(it)
     f, s = iterate(it)
     @constinferred Nothing iterate(it, s)