diff --git a/test/threads.jl b/test/threads.jl
index 4e21bc5da8740..f8deea7bc89e6 100644
--- a/test/threads.jl
+++ b/test/threads.jl
@@ -273,7 +273,9 @@ let atomic_types = [Int8, Int16, Int32, Int64, Int128,
                     Float16, Float32, Float64]
     # Temporarily omit 128-bit types on 32bit x86
     # 128-bit atomics do not exist on AArch32.
-    if Sys.ARCH === :i686 || startswith(string(Sys.ARCH), "arm")
+    # And we don't support them yet on power.
+    if Sys.ARCH === :i686 || Sys.ARCH === :powerpc64le ||
+       startswith(string(Sys.ARCH), "arm")
         filter!(T -> sizeof(T)<=8, atomic_types)
     end
     for T in atomic_types