diff --git a/tests/30backend-threadpool.tests b/tests/30backend-threadpool.tests
index a92b32059..ca2464bfe 100644
--- a/tests/30backend-threadpool.tests
+++ b/tests/30backend-threadpool.tests
@@ -48,31 +48,31 @@ TEST "Many Acquires/Releases test" many-acquire-release <<END
 err: destroying threadpool
 
 err: destroying individual pool #0
-err: number of threads in the pool=50
+err: number of threads in the pool=10
 err: deleting thread
 err: destroying the pool mutex
 err: pool mutex destroyed
 
 err: destroying individual pool #1
-err: number of threads in the pool=50
+err: number of threads in the pool=10
 err: deleting thread
 err: destroying the pool mutex
 err: pool mutex destroyed
 
 err: destroying individual pool #2
-err: number of threads in the pool=50
+err: number of threads in the pool=10
 err: deleting thread
 err: destroying the pool mutex
 err: pool mutex destroyed
 
 err: destroying individual pool #3
-err: number of threads in the pool=50
+err: number of threads in the pool=10
 err: deleting thread
 err: destroying the pool mutex
 err: pool mutex destroyed
 
 err: destroying individual pool #4
-err: number of threads in the pool=50
+err: number of threads in the pool=10
 err: deleting thread
 err: destroying the pool mutex
 err: pool mutex destroyed
diff --git a/tests/backend/test-threadpool.c b/tests/backend/test-threadpool.c
index 66de5c1a3..41f5ae4ee 100644
--- a/tests/backend/test-threadpool.c
+++ b/tests/backend/test-threadpool.c
@@ -67,9 +67,9 @@ TEST ("basic-acquire-release")
 TEST ("many-acquire-release")
 {
 
-  const int threads_per_pool_count = 50;
+  const int threads_per_pool_count = 10;
 
-  lumiera_threadpool_init(50);
+  lumiera_threadpool_init(10);
   LumieraThread threads[threads_per_pool_count*LUMIERA_THREADCLASS_COUNT];
   
   for (int kind = 0; kind < LUMIERA_THREADCLASS_COUNT; ++kind)
@@ -95,9 +95,9 @@ TEST ("many-acquire-release")
 TEST ("toomany-acquire-release")
 {
 
-  const int threads_per_pool_count = 51;
+  const int threads_per_pool_count = 11;
 
-  lumiera_threadpool_init(50);
+  lumiera_threadpool_init(10);
   LumieraThread threads[threads_per_pool_count*LUMIERA_THREADCLASS_COUNT];
   
   for (int kind = 0; kind < LUMIERA_THREADCLASS_COUNT; ++kind)