diff --git a/test/nested.cc b/test/nested.cc
index f273fbef..d3dfcd9d 100644
--- a/test/nested.cc
+++ b/test/nested.cc
@@ -239,7 +239,7 @@ bool testcase_nested::run() {
     const unsigned window_width =
         (!should_continue() || flipcoin_x4()) ? 0 : edge2window(salt);
     const unsigned head_count = edge2count(salt);
-    log_debug("nested: step #%zu (serial %" PRIu64
+    log_debug("nested: step #%" PRIu64 " (serial %" PRIu64
               ", window %u, count %u) salt %" PRIu64,
               nops_completed, serial, window_width, head_count, salt);
 
diff --git a/test/test.cc b/test/test.cc
index e339d2ca..beeba7ab 100644
--- a/test/test.cc
+++ b/test/test.cc
@@ -340,18 +340,18 @@ void testcase::report(size_t nops_done) {
     return;
 
   nops_completed += nops_done;
-  log_debug("== complete +%" PRIuPTR " iteration, total %" PRIuPTR " done",
+  log_debug("== complete +%" PRIuPTR " iteration, total %" PRIu64 " done",
             nops_done, nops_completed);
 
   kick_progress(true);
 
   if (config.signal_nops && !signalled &&
       config.signal_nops <= nops_completed) {
-    log_trace(">> signal(n-ops %" PRIuPTR ")", nops_completed);
+    log_trace(">> signal(n-ops %" PRIu64 ")", nops_completed);
     if (!global::singlemode)
       osal_broadcast(config.actor_id);
     signalled = true;
-    log_trace("<< signal(n-ops %" PRIuPTR ")", nops_completed);
+    log_trace("<< signal(n-ops %" PRIu64 ")", nops_completed);
   }
 }
 
diff --git a/test/test.h b/test/test.h
index 68d3968b..8ecf5c46 100644
--- a/test/test.h
+++ b/test/test.h
@@ -148,7 +148,7 @@ protected:
   bool signalled{false};
   bool need_speculum_assign{false};
 
-  size_t nops_completed{0};
+  uint64_t nops_completed{0};
   chrono::time start_timestamp;
   keygen::buffer key;
   keygen::buffer data;
diff --git a/test/ttl.cc b/test/ttl.cc
index 096687d9..e3927d9c 100644
--- a/test/ttl.cc
+++ b/test/ttl.cc
@@ -139,7 +139,7 @@ bool testcase_ttl::run() {
     const unsigned window_width =
         (!should_continue() || flipcoin_x4()) ? 0 : edge2window(salt);
     unsigned head_count = edge2count(salt);
-    log_debug("ttl: step #%zu (serial %" PRIu64
+    log_debug("ttl: step #%" PRIu64 " (serial %" PRIu64
               ", window %u, count %u) salt %" PRIu64,
               nops_completed, serial, window_width, head_count, salt);