diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3af7ec8..57d0cfa 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -25,7 +25,7 @@ jobs:
             ${{ runner.os }}-dub-
 
       - name: Run tests
-        run: dub -c=unittest-release
+        run: dub -c=unittest-release -- -d
 
       - name: Build
         run: dub build
diff --git a/source/concurrency/operations/race.d b/source/concurrency/operations/race.d
index 6bebb98..6bb0e5c 100644
--- a/source/concurrency/operations/race.d
+++ b/source/concurrency/operations/race.d
@@ -85,10 +85,10 @@ struct RaceSender(Senders...) if (allSatisfy!(ApplyRight!(models, isSender), Sen
 private class State(Value) : StopSource {
   import concurrency.bitfield;
   StopCallback cb;
+  shared SharedBitField!Flags bitfield;
   static if (!is(Value == void))
     Value value;
   Exception exception;
-  shared SharedBitField!Flags bitfield;
   bool noDropouts;
   this(bool noDropouts) {
     this.noDropouts = noDropouts;
diff --git a/tests/ut/concurrency/sender.d b/tests/ut/concurrency/sender.d
index 26f8ad7..0a76ef6 100644
--- a/tests/ut/concurrency/sender.d
+++ b/tests/ut/concurrency/sender.d
@@ -101,7 +101,7 @@ import core.atomic : atomicOp;
   shared int g;
 
   auto s = just(1)
-    .then((int i) @trusted shared { return g.atomicOp!"+="(1); })
+    .then((int i) @trusted shared { import std.stdio; auto r = g.atomicOp!"+="(1); r.writeln; return r; })
     .via(ThreadSender())
     .toShared();
 
@@ -223,3 +223,17 @@ import core.atomic : atomicOp;
   race(delay(2.msecs).then(() shared => 2),
        delay(1.msecs).then(() shared => 1)).syncWait.value.should == 1;
 }
+
+@("atomicOp")
+@safe unittest {
+  import concurrency.operations.toshared;
+  import std.stdio;
+
+  shared int g;
+
+  auto s = justFrom(() @trusted shared => g.atomicOp!"+="(1))
+    .via(ThreadSender());
+
+  whenAll(s,s,s,s,s,s,s,s,s,s).syncWait.assumeOk;
+  g.should == 10;
+}