diff --git a/test/new.jl b/test/new.jl
index f575c7223d..31305bed0f 100644
--- a/test/new.jl
+++ b/test/new.jl
@@ -2129,7 +2129,7 @@ end
                         withenv(
                             "EXPECTED_NUM_THREADS_DEFAULT" => "$other_nthreads_default",
                             "EXPECTED_NUM_THREADS_INTERACTIVE" => "$default_nthreads_interactive",
-                            "JULIA_NUM_THREADS" => "$other_nthreads_default",
+                            "JULIA_NUM_THREADS" => "$other_nthreads_default,$default_nthreads_interactive",
                         ) do
                             Pkg.test("TestThreads")
                         end
@@ -2149,7 +2149,7 @@ end
                             "EXPECTED_NUM_THREADS_INTERACTIVE" => "$default_nthreads_interactive",
                             "JULIA_NUM_THREADS" => nothing,
                         ) do
-                            Pkg.test("TestThreads"; julia_args=`--threads=$other_nthreads_default`)
+                            Pkg.test("TestThreads"; julia_args=`--threads=$other_nthreads_default,$default_nthreads_interactive`)
                         end
                     end
                     @testset "--threads=other_nthreads_default,other_nthreads_interactive" begin