diff --git a/misc/dashboard/app/build/notify.go b/misc/dashboard/app/build/notify.go
index 54a09bfd87..09975b2908 100644
--- a/misc/dashboard/app/build/notify.go
+++ b/misc/dashboard/app/build/notify.go
@@ -119,7 +119,7 @@ func sendFailMail(c appengine.Context, com *Commit, builder string) {
 	k := datastore.NewKey(c, "Log", r.LogHash, 0, nil)
 	l := new(Log)
 	if err := datastore.Get(c, k, l); err != nil {
-		c.Errorf("finding Log record %v: err", r.LogHash, err)
+		c.Errorf("finding Log record %v: %v", r.LogHash, err)
 		return
 	}
 
diff --git a/src/cmd/gotest/gotest.go b/src/cmd/gotest/gotest.go
index 8a8dad557a..c97debb064 100644
--- a/src/cmd/gotest/gotest.go
+++ b/src/cmd/gotest/gotest.go
@@ -401,7 +401,7 @@ func writeTestmainGo() {
 	fmt.Fprintln(b) // for gofmt
 
 	// Tests.
-	fmt.Fprintln(b, "var tests = []testing.InternalTest{\n")
+	fmt.Fprintf(b, "var tests = []testing.InternalTest{\n")
 	for _, f := range files {
 		for _, t := range f.tests {
 			fmt.Fprintf(b, "\t{\"%s.%s\", %s.%s},\n", f.pkg, t, renamedPackage(f.pkg), t)
diff --git a/src/pkg/fmt/fmt_test.go b/src/pkg/fmt/fmt_test.go
index d34a4f8fd2..beb410fa11 100644
--- a/src/pkg/fmt/fmt_test.go
+++ b/src/pkg/fmt/fmt_test.go
@@ -517,7 +517,7 @@ var mallocTest = []struct {
 	{1, `Sprintf("xxx")`, func() { Sprintf("xxx") }},
 	{1, `Sprintf("%x")`, func() { Sprintf("%x", 7) }},
 	{2, `Sprintf("%s")`, func() { Sprintf("%s", "hello") }},
-	{1, `Sprintf("%x %x")`, func() { Sprintf("%x", 7, 112) }},
+	{1, `Sprintf("%x %x")`, func() { Sprintf("%x %x", 7, 112) }},
 	{1, `Sprintf("%g")`, func() { Sprintf("%g", 3.14159) }},
 	{0, `Fprintf(buf, "%x %x %x")`, func() { mallocBuf.Reset(); Fprintf(&mallocBuf, "%x %x %x", 7, 8, 9) }},
 	{1, `Fprintf(buf, "%s")`, func() { mallocBuf.Reset(); Fprintf(&mallocBuf, "%s", "hello") }},