diff --git a/logging/mock.go b/logging/mock.go
index 66e046e..cb96f2d 100644
--- a/logging/mock.go
+++ b/logging/mock.go
@@ -59,7 +59,7 @@ func (m writerMap) CheckWrittenAtLevel(t *testing.T, lv LogLevel, exp string) {
 	}
 	// 32 bytes covers the date, time and filename up to the colon in
 	// 2011/10/22 10:22:57 log_test.go:<line no>: <level> <log message>
-	if len(w.written) <= 32 {
+	if len(w.written) <= 33 {
 		t.Errorf("Not enough bytes logged at level %s:", LogString(lv))
 		t.Errorf("\tgot: %s", string(w.written))
 	}