diff --git a/aos/events/logging/logger_test.cc b/aos/events/logging/logger_test.cc
index 6d45413..55bf687 100644
--- a/aos/events/logging/logger_test.cc
+++ b/aos/events/logging/logger_test.cc
@@ -2739,8 +2739,21 @@
 
   EXPECT_TRUE(timestamp_file_count == 2u || timestamp_file_count == 4u);
 
-  // TODO(austin): Finish reading it.  We don't have a valid start time so
-  // log_reader gets rather grumpy.
+  // Confirm that we can actually sort the resulting log and read it.
+  {
+    LogReader reader(SortParts(filenames));
+
+    SimulatedEventLoopFactory log_reader_factory(reader.configuration());
+    log_reader_factory.set_send_delay(chrono::microseconds(0));
+
+    // This sends out the fetched messages and advances time to the start of
+    // the log file.
+    reader.Register(&log_reader_factory);
+
+    log_reader_factory.Run();
+
+    reader.Deregister();
+  }
 }
 
 // Tests that we properly handle one direction of message_bridge being
diff --git a/aos/network/multinode_timestamp_filter.cc b/aos/network/multinode_timestamp_filter.cc
index 72b1cc5..d6419a0 100644
--- a/aos/network/multinode_timestamp_filter.cc
+++ b/aos/network/multinode_timestamp_filter.cc
@@ -1355,7 +1355,10 @@
           .boot = next_boot,
           .time = timestamp_mappers_[node_a_index]->monotonic_start_time(
               next_boot)};
-      if (next_start_time < next_node_time) {
+      // If we don't have a start time, it doesn't make sense to solve for it.
+      // Ignore that case.
+      if (next_start_time < next_node_time &&
+          next_start_time.time != monotonic_clock::min_time) {
         VLOG(1) << "Candidate for node " << node_a_index
                 << " is the next startup time, " << next_start_time;
         next_node_time = next_start_time;