diff --git a/tests/30backend-threadpool.tests b/tests/30backend-threadpool.tests
index cbfb02550..6ba717091 100644
--- a/tests/30backend-threadpool.tests
+++ b/tests/30backend-threadpool.tests
@@ -9,7 +9,7 @@ TEST "Most basic threadpool test" threadpool-basic <<END
 END
 
 TEST "process a function" process-function <<END
-err: the input to the function is 440616
+err: the input to the function is
 err: finished waiting
 END
 
diff --git a/tests/backend/test-threadpool.c b/tests/backend/test-threadpool.c
index 952bfac2b..805e61c2c 100644
--- a/tests/backend/test-threadpool.c
+++ b/tests/backend/test-threadpool.c
@@ -180,7 +180,7 @@ TEST ("process-function")
 {
   // this is what the scheduler would do once it figures out what function a job needs to run
   LumieraThread t;
-  int number = 440616;
+  int number = 1073676287;
 
   lumiera_threadpool_init();