Index: tests/concurrent/park/.expect/force_preempt.txt
===================================================================
--- tests/concurrent/park/.expect/force_preempt.txt	(revision cb196f2ddcc1b476a171fa339343d6a3f91218d2)
+++ tests/concurrent/park/.expect/force_preempt.txt	(revision 66812dd99f2cc97ee7d08f95d6b009fa64a41a6b)
@@ -0,0 +1,1 @@
+done
Index: tests/concurrent/park/.expect/start_parked.txt
===================================================================
--- tests/concurrent/park/.expect/start_parked.txt	(revision cb196f2ddcc1b476a171fa339343d6a3f91218d2)
+++ tests/concurrent/park/.expect/start_parked.txt	(revision 66812dd99f2cc97ee7d08f95d6b009fa64a41a6b)
@@ -0,0 +1,1 @@
+done
Index: tests/concurrent/park/force_preempt.cfa
===================================================================
--- tests/concurrent/park/force_preempt.cfa	(revision cb196f2ddcc1b476a171fa339343d6a3f91218d2)
+++ tests/concurrent/park/force_preempt.cfa	(revision 66812dd99f2cc97ee7d08f95d6b009fa64a41a6b)
@@ -57,3 +57,4 @@
 		Waiter waiters[5];
 	}
+	printf( "done\n" );				// non-empty .expect file
 }
Index: tests/concurrent/park/start_parked.cfa
===================================================================
--- tests/concurrent/park/start_parked.cfa	(revision cb196f2ddcc1b476a171fa339343d6a3f91218d2)
+++ tests/concurrent/park/start_parked.cfa	(revision 66812dd99f2cc97ee7d08f95d6b009fa64a41a6b)
@@ -3,11 +3,12 @@
 thread Parker {};
 void main( Parker & ) {
-      park( __cfaabi_dbg_ctx );
+	park( __cfaabi_dbg_ctx );
 }
 
 int main() {
-      for(1000) {
-            Parker parker;
-            unpark( parker __cfaabi_dbg_ctx2 );
-      }
+	for(1000) {
+		Parker parker;
+		unpark( parker __cfaabi_dbg_ctx2 );
+	}
+	printf( "done\n" );									// non-empty .expect file
 }