diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 8f049b2ad..55160ee26 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -20,7 +20,6 @@ jobs:
           - Downstream
         version:
           - '1'
-          - '1.6'
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
diff --git a/src/utils.jl b/src/utils.jl
index d013c9ac9..7f5f4b824 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -27,6 +27,8 @@ function numargs(f::RuntimeGeneratedFunctions.RuntimeGeneratedFunction{
     (length(T),)
 end
 
+numargs(f::ComposedFunction) = numargs(f.inner)
+
 """
 $(SIGNATURES)
 
diff --git a/test/function_building_error_messages.jl b/test/function_building_error_messages.jl
index 269985a39..924c342e5 100644
--- a/test/function_building_error_messages.jl
+++ b/test/function_building_error_messages.jl
@@ -7,10 +7,11 @@ function test_num_args()
     numpar = SciMLBase.numargs(f) # Should be [1,2]
     g = (x, y) -> x^2
     numpar2 = SciMLBase.numargs(g) # [2]
+    numpar3 = SciMLBase.numargs(sqrt ∘ g) # [2]
     @show numpar, minimum(numpar) == 1, maximum(numpar) == 2
     minimum(numpar) == 1 && maximum(numpar) == 2 &&
         maximum(numpar2) == 2 &&
-        minimum(numpar2) == 2
+        only(numpar3) == 2
 end
 
 @test test_num_args()
@@ -614,7 +615,7 @@ bvjp(u, v, p, t) = [1.0]
 @test_throws SciMLBase.NonconformingFunctionsError BVPFunction(bfoop, bciip, vjp = bvjp)
 bvjp(du, u, v, p, t) = [1.0]
 BVPFunction(bfiip, bciip, vjp = bvjp)
-  
+
 @test_throws SciMLBase.NonconformingFunctionsError BVPFunction(bfoop, bciip, vjp = bvjp)
 
 # IntegralFunction