Index: tests/concurrent/barrier/generation.cfa
===================================================================
--- tests/concurrent/barrier/generation.cfa	(revision e8b8e6571477c9b17040ff37735010ddcab187d0)
+++ tests/concurrent/barrier/generation.cfa	(revision 9fce2572b22753fff14164bc36f6a3b14e74ae49)
@@ -37,5 +37,5 @@
 		for(c; 'A' ~= 'Z') {
 			// Yield for chaos
-			yield(prng(this, 10));
+			yield( (unsigned)prng(this, 10) );
 
 			// Print the generation, no newline because
@@ -43,5 +43,5 @@
 
 			// Yield again for more chaos
-			yield(prng(this, 10));
+			yield( (unsigned)prng(this, 10) );
 
 			// Block on the barrier
Index: tests/concurrent/barrier/order.cfa
===================================================================
--- tests/concurrent/barrier/order.cfa	(revision e8b8e6571477c9b17040ff37735010ddcab187d0)
+++ tests/concurrent/barrier/order.cfa	(revision 9fce2572b22753fff14164bc36f6a3b14e74ae49)
@@ -37,5 +37,5 @@
 	for(l; NUM_LAPS) {
 		// Yield for chaos
-		yield(prng(this, 10));
+		yield( (unsigned)prng(this, 10) );
 
 		// Block and what order we arrived
Index: tests/concurrent/once.cfa
===================================================================
--- tests/concurrent/once.cfa	(revision e8b8e6571477c9b17040ff37735010ddcab187d0)
+++ tests/concurrent/once.cfa	(revision 9fce2572b22753fff14164bc36f6a3b14e74ae49)
@@ -30,5 +30,5 @@
 
 		// sometime yields
-		yield(prng(this, 3));
+		yield( (unsigned)prng(this, 3) );
 	}
 }
Index: tests/concurrent/readyQ/leader_spin.cfa
===================================================================
--- tests/concurrent/readyQ/leader_spin.cfa	(revision e8b8e6571477c9b17040ff37735010ddcab187d0)
+++ tests/concurrent/readyQ/leader_spin.cfa	(revision 9fce2572b22753fff14164bc36f6a3b14e74ae49)
@@ -26,10 +26,10 @@
 }
 
-PRNG lead_rng;
+PRNG64 lead_rng;
 volatile unsigned leader;
 volatile size_t lead_idx;
 
-const unsigned nthreads = 17;
-const unsigned stop_count = 327;
+const uint64_t nthreads = 17;
+const uint64_t stop_count = 327;
 
 thread$ * the_main;