diff --git a/src/api/helpers.jl b/src/api/helpers.jl
index 1b0fdb117..fdbb4b3c4 100644
--- a/src/api/helpers.jl
+++ b/src/api/helpers.jl
@@ -88,8 +88,11 @@ function h5a_iterate_helper(
 )::herr_t
     f, err_ref = data
     try
-        return herr_t(f(loc_id, attr_name, ainfo))
+        ret = herr_t(f(loc_id, attr_name, ainfo))
+        @async @info "h5a_iterate_helper" ret
+        return ret
     catch err
+        @async @info "h5a_iterate_helper got an error" err
         err_ref[] = err
         return herr_t(-1)
     end
@@ -465,8 +468,11 @@ function h5l_iterate_helper(
 )::herr_t
     f, err_ref = data
     try
-        return herr_t(f(group, name, info))
+        ret = herr_t(f(group, name, info))
+        @async @info "h5l_iterate_helper" ret
+        return ret
     catch err
+        @async @info "h5l_iterate_helper got an error" err
         err_ref[] = err
         return herr_t(-1)
     end
diff --git a/test/api.jl b/test/api.jl
index 8c372b1dc..174df3e3a 100644
--- a/test/api.jl
+++ b/test/api.jl
@@ -38,11 +38,10 @@ using HDF5, Test
     @test names == ["a"]
 
     # Julia error
-    #=
     @test_throws AssertionError HDF5.API.h5a_iterate(
         f, HDF5.API.H5_INDEX_NAME, HDF5.API.H5_ITER_INC
     ) do loc, name, info
-        @assert false
+        throw(AssertionError("False is not true"))
     end
 
     # HDF5 error
@@ -51,7 +50,6 @@ using HDF5, Test
     ) do loc, name, info
         return -1
     end
-    =#
 end
 
 @testset "h5l_iterate" begin
@@ -91,7 +89,6 @@ end
     end == 1
     @test names == ["a"]
 
-    #=
     # HDF5 error
     @test_throws HDF5.API.H5Error HDF5.API.h5l_iterate(
         f, HDF5.API.H5_INDEX_NAME, HDF5.API.H5_ITER_INC
@@ -103,9 +100,8 @@ end
     @test_throws AssertionError HDF5.API.h5l_iterate(
         f, HDF5.API.H5_INDEX_NAME, HDF5.API.H5_ITER_INC
     ) do loc, name, info
-        @assert false
+        throw(AssertionError("False is not true"))
     end
-    =#
 end
 
 @testset "h5dchunk_iter" begin