diff --git a/tracker/progress.go b/tracker/progress.go
index f4e1e07d..5948fadf 100644
--- a/tracker/progress.go
+++ b/tracker/progress.go
@@ -246,7 +246,7 @@ func (pr *Progress) String() string {
 		fmt.Fprintf(&buf, " pendingSnap=%d", pr.PendingSnapshot)
 	}
 	if !pr.RecentActive {
-		fmt.Fprintf(&buf, " inactive")
+		fmt.Fprint(&buf, " inactive")
 	}
 	if n := pr.Inflights.Count(); n > 0 {
 		fmt.Fprintf(&buf, " inflight=%d", n)
diff --git a/tracker/tracker.go b/tracker/tracker.go
index 938b7878..cf60c23b 100644
--- a/tracker/tracker.go
+++ b/tracker/tracker.go
@@ -87,7 +87,7 @@ func (c Config) String() string {
 		fmt.Fprintf(&buf, " learners_next=%s", quorum.MajorityConfig(c.LearnersNext).String())
 	}
 	if c.AutoLeave {
-		fmt.Fprintf(&buf, " autoleave")
+		fmt.Fprint(&buf, " autoleave")
 	}
 	return buf.String()
 }
diff --git a/util.go b/util.go
index 0510d3f7..95591f53 100644
--- a/util.go
+++ b/util.go
@@ -161,14 +161,14 @@ func DescribeMessage(m pb.Message, f EntryFormatter) string {
 		fmt.Fprintf(&buf, " Commit:%d", m.Commit)
 	}
 	if len(m.Entries) > 0 {
-		fmt.Fprintf(&buf, " Entries:[")
+		fmt.Fprint(&buf, " Entries:[")
 		for i, e := range m.Entries {
 			if i != 0 {
 				buf.WriteString(", ")
 			}
 			buf.WriteString(DescribeEntry(e, f))
 		}
-		fmt.Fprintf(&buf, "]")
+		fmt.Fprint(&buf, "]")
 	}
 	if s := m.Snapshot; s != nil && !IsEmptySnap(*s) {
 		fmt.Fprintf(&buf, " Snapshot: %s", DescribeSnapshot(*s))