diff --git a/src/pkg/crypto/tls/root_test.go b/src/pkg/crypto/tls/root_test.go
index 8dcf74ea72..e61c218512 100644
--- a/src/pkg/crypto/tls/root_test.go
+++ b/src/pkg/crypto/tls/root_test.go
@@ -50,7 +50,7 @@ func TestCertHostnameVerifyWindows(t *testing.T) {
 		conn, err := Dial("tcp", addr+":443", cfg)
 		if err == nil {
 			conn.Close()
-			t.Errorf("should fail to verify for example.com: %v", addr, err)
+			t.Errorf("should fail to verify for example.com: %v", addr)
 			continue
 		}
 		_, ok := err.(x509.HostnameError)
diff --git a/src/pkg/fmt/fmt_test.go b/src/pkg/fmt/fmt_test.go
index 8c5afccac5..758fc50d08 100644
--- a/src/pkg/fmt/fmt_test.go
+++ b/src/pkg/fmt/fmt_test.go
@@ -835,7 +835,7 @@ func TestIsSpace(t *testing.T) {
 	// IsSpace = isSpace is defined in export_test.go.
 	for i := rune(0); i <= unicode.MaxRune; i++ {
 		if IsSpace(i) != unicode.IsSpace(i) {
-			t.Errorf("isSpace(%U) = %v, want %v", IsSpace(i), unicode.IsSpace(i))
+			t.Errorf("isSpace(%U) = %v, want %v", i, IsSpace(i), unicode.IsSpace(i))
 		}
 	}
 }