diff --git a/decoder_test.go b/decoder_test.go
index 80c1359..5f3bc09 100644
--- a/decoder_test.go
+++ b/decoder_test.go
@@ -6,6 +6,7 @@ import (
 )
 
 func TestDecompress(t *testing.T) {
+	t.Parallel()
 	infile, err := os.Open("./data/sample.tta")
 	if err != nil {
 		t.Fatal(err)
diff --git a/encoder_test.go b/encoder_test.go
index 5e779de..7af8115 100644
--- a/encoder_test.go
+++ b/encoder_test.go
@@ -6,6 +6,7 @@ import (
 )
 
 func TestCompress(t *testing.T) {
+	t.Parallel()
 	infile, err := os.Open("./data/sample.wav")
 	if err != nil {
 		t.Fatal(err)
diff --git a/fifo_test.go b/fifo_test.go
index 06e4d98..4855402 100644
--- a/fifo_test.go
+++ b/fifo_test.go
@@ -5,6 +5,7 @@ import (
 )
 
 func TestReadByte(t *testing.T) {
+	t.Parallel()
 	fifo := ttaFifo{}
 	for i := 0; i < fifoBufferSize; i++ {
 		fifo.buffer[i] = byte(i)
@@ -31,6 +32,7 @@ func TestReadByte(t *testing.T) {
 }
 
 func TestReadUint16(t *testing.T) {
+	t.Parallel()
 	fifo := ttaFifo{}
 	for i := 0; i < fifoBufferSize; i++ {
 		fifo.buffer[i] = byte(i)
@@ -59,6 +61,7 @@ func TestReadUint16(t *testing.T) {
 }
 
 func TestReadUint32(t *testing.T) {
+	t.Parallel()
 	fifo := ttaFifo{}
 	for i := 0; i < fifoBufferSize; i++ {
 		fifo.buffer[i] = byte(i)
@@ -87,6 +90,7 @@ func TestReadUint32(t *testing.T) {
 }
 
 func TestWriteByte(t *testing.T) {
+	t.Parallel()
 	fifo := ttaFifo{}
 	fifo.pos = 0
 	fifo.end = fifoBufferSize
diff --git a/stream_test.go b/stream_test.go
index 389e330..5efae7e 100644
--- a/stream_test.go
+++ b/stream_test.go
@@ -9,6 +9,7 @@ import (
 )
 
 func TestComprehensive(t *testing.T) {
+	t.Parallel()
 	testfile := "tta_comprehensive_test.wav"
 	if info, err := os.Stat(testfile); err == nil {
 		if !info.IsDir() {
diff --git a/util_test.go b/util_test.go
index 4546838..2c9c424 100644
--- a/util_test.go
+++ b/util_test.go
@@ -6,6 +6,7 @@ import (
 )
 
 func TestComputeKeyDigits(t *testing.T) {
+	t.Parallel()
 	var strs = [...]string{"whatisthis?", "1", "", "12", "089q3eoib*(*U(*#$", "~*)(*)@&("}
 	var digits = [...][8]byte{
 		{37, 121, 62, 136, 117, 151, 236, 181},
@@ -24,6 +25,7 @@ func TestComputeKeyDigits(t *testing.T) {
 }
 
 func TestConvertPassword(t *testing.T) {
+	t.Parallel()
 	var strs = [...]string{
 		"",
 		"1",
diff --git a/wav_test.go b/wav_test.go
index cd4d5a9..0afc249 100644
--- a/wav_test.go
+++ b/wav_test.go
@@ -12,6 +12,7 @@ var wavSlice = []byte{0x52, 0x49, 0x46, 0x46, 0x98, 0x03, 0x00, 0x00, 0x57, 0x41
 var wavSize = uint32(0x0374)
 
 func TestReadHeader(t *testing.T) {
+	t.Parallel()
 	file, err := os.Open("./data/sample.wav")
 	if err != nil {
 		t.Fatal(err)
@@ -28,6 +29,7 @@ func TestReadHeader(t *testing.T) {
 }
 
 func TestWriteHeader(t *testing.T) {
+	t.Parallel()
 	filename := os.TempDir() + "/tta_tmp.wav"
 	file, err := os.Create(filename)
 	if err != nil {