2 files changed, 5 insertions, 0 deletions
diff --git a/tests/stdlib/concurrency/tatomics.nim b/tests/stdlib/concurrency/tatomics.nim
index 9cfdce83d..3fb5197da 100644
--- a/tests/stdlib/concurrency/tatomics.nim
+++ b/tests/stdlib/concurrency/tatomics.nim
@@ -1,3 +1,7 @@
+discard """
+  matrix: "--mm:refc; --mm:orc"
+"""
+
 # test atomic operations
 
 import std/[atomics, bitops]
diff --git a/tests/stdlib/concurrency/tatomics_size.nim b/tests/stdlib/concurrency/tatomics_size.nim
index 7b43787fb..cfe568623 100644
--- a/tests/stdlib/concurrency/tatomics_size.nim
+++ b/tests/stdlib/concurrency/tatomics_size.nim
@@ -1,4 +1,5 @@
 discard """
+  matrix: "--mm:refc; --mm:orc"
   targets: "c cpp"
 """
 import std/atomics