diff --git a/enumerator/usb_windows_test.go b/enumerator/usb_windows_test.go
index 3d39e0a..adb6370 100644
--- a/enumerator/usb_windows_test.go
+++ b/enumerator/usb_windows_test.go
@@ -8,8 +8,6 @@ package enumerator
 
 import (
 	"testing"
-
-	"github.com/stretchr/testify/require"
 )
 
 func parseAndReturnDeviceID(deviceID string) *PortDetails {
@@ -19,31 +17,57 @@ func parseAndReturnDeviceID(deviceID string) *PortDetails {
 }
 
 func TestParseDeviceID(t *testing.T) {
-	r := require.New(t)
-	test := func(deviceId, vid, pid, serialNo string) {
-		res := parseAndReturnDeviceID(deviceId)
-		r.True(res.IsUSB)
-		r.Equal(vid, res.VID)
-		r.Equal(pid, res.PID)
-		r.Equal(serialNo, res.SerialNumber)
+	tests := []struct {
+		name     string
+		deviceID string
+		vid      string
+		pid      string
+		serialNo string
+	}{
+		{name: "FTDI FT232", deviceID: "FTDIBUS\\VID_0403+PID_6001+A6004CCFA\\0000", vid: "0403", pid: "6001", serialNo: "A6004CCFA"},
+		{name: "Teensy USB serial", deviceID: "USB\\VID_16C0&PID_0483\\12345", vid: "16C0", pid: "0483", serialNo: "12345"},
+		{name: "Arduino with serial number", deviceID: "USB\\VID_2341&PID_0000\\64936333936351400000", vid: "2341", pid: "0000", serialNo: "64936333936351400000"},
+		{name: "Arduino with different serial number", deviceID: "USB\\VID_2341&PID_0000\\6493234373835191F1F1", vid: "2341", pid: "0000", serialNo: "6493234373835191F1F1"},
+		{name: "Arduino MKR composite", deviceID: "USB\\VID_2341&PID_804E&MI_00\\6&279A3900&0&0000", vid: "2341", pid: "804E", serialNo: ""},
+		{name: "Arduino MKR1000 bootloader", deviceID: "USB\\VID_2341&PID_004E\\5&C3DC240&0&1", vid: "2341", pid: "004E", serialNo: ""},
+		{name: "Atmel EDBG debugger", deviceID: "USB\\VID_03EB&PID_2111&MI_01\\6&21F3553F&0&0001", vid: "03EB", pid: "2111", serialNo: ""},
+		{name: "Arduino Zero composite", deviceID: "USB\\VID_2341&PID_804D&MI_00\\6&1026E213&0&0000", vid: "2341", pid: "804D", serialNo: ""},
+		{name: "Arduino Zero bootloader", deviceID: "USB\\VID_2341&PID_004D\\5&C3DC240&0&1", vid: "2341", pid: "004D", serialNo: ""},
+		{name: "Prolific PL2303", deviceID: "USB\\VID_067B&PID_2303\\6&2C4CB384&0&3", vid: "067B", pid: "2303", serialNo: ""},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			res := parseAndReturnDeviceID(tt.deviceID)
+			if !res.IsUSB {
+				t.Fatal("expected IsUSB to be true")
+			}
+			if res.VID != tt.vid {
+				t.Errorf("VID: got %q, expected %q", res.VID, tt.vid)
+			}
+			if res.PID != tt.pid {
+				t.Errorf("PID: got %q, expected %q", res.PID, tt.pid)
+			}
+			if res.SerialNumber != tt.serialNo {
+				t.Errorf("SerialNumber: got %q, expected %q", res.SerialNumber, tt.serialNo)
+			}
+		})
 	}
-
-	test("FTDIBUS\\VID_0403+PID_6001+A6004CCFA\\0000", "0403", "6001", "A6004CCFA")
-	test("USB\\VID_16C0&PID_0483\\12345", "16C0", "0483", "12345")
-	test("USB\\VID_2341&PID_0000\\64936333936351400000", "2341", "0000", "64936333936351400000")
-	test("USB\\VID_2341&PID_0000\\6493234373835191F1F1", "2341", "0000", "6493234373835191F1F1")
-	test("USB\\VID_2341&PID_804E&MI_00\\6&279A3900&0&0000", "2341", "804E", "")
-	test("USB\\VID_2341&PID_004E\\5&C3DC240&0&1", "2341", "004E", "")
-	test("USB\\VID_03EB&PID_2111&MI_01\\6&21F3553F&0&0001", "03EB", "2111", "") // Atmel EDBG
-	test("USB\\VID_2341&PID_804D&MI_00\\6&1026E213&0&0000", "2341", "804D", "")
-	test("USB\\VID_2341&PID_004D\\5&C3DC240&0&1", "2341", "004D", "")
-	test("USB\\VID_067B&PID_2303\\6&2C4CB384&0&3", "067B", "2303", "") // PL2303
 }
 
 func TestParseDeviceIDWithInvalidStrings(t *testing.T) {
-	r := require.New(t)
-	res := parseAndReturnDeviceID("ABC")
-	r.False(res.IsUSB)
-	res2 := parseAndReturnDeviceID("USB")
-	r.False(res2.IsUSB)
+	tests := []struct {
+		name     string
+		deviceID string
+	}{
+		{name: "unrecognized prefix", deviceID: "ABC"},
+		{name: "USB prefix without fields", deviceID: "USB"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			res := parseAndReturnDeviceID(tt.deviceID)
+			if res.IsUSB {
+				t.Fatal("expected IsUSB to be false")
+			}
+		})
+	}
 }
diff --git a/go.mod b/go.mod
index 7513460..b81c73b 100644
--- a/go.mod
+++ b/go.mod
@@ -1,14 +1,5 @@
 module go.bug.st/serial
 
-go 1.17
+go 1.26.0
 
-require (
-	github.com/stretchr/testify v1.8.4
-	golang.org/x/sys v0.19.0
-)
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)
+require golang.org/x/sys v0.43.0
diff --git a/go.sum b/go.sum
index 239af81..71016e3 100644
--- a/go.sum
+++ b/go.sum
@@ -1,19 +1,2 @@
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
-golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+golang.org/x/sys v0.43.0 h1:Rlag2XtaFTxp19wS8MXlJwTvoh8ArU6ezoyFsMyCTNI=
+golang.org/x/sys v0.43.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
diff --git a/serial_linux_test.go b/serial_linux_test.go
index 4a76fbe..701430a 100644
--- a/serial_linux_test.go
+++ b/serial_linux_test.go
@@ -14,21 +14,25 @@ import (
 	"os/exec"
 	"testing"
 	"time"
-
-	"github.com/stretchr/testify/require"
 )
 
 func startSocatAndWaitForPort(t *testing.T, ctx context.Context) *exec.Cmd {
+	t.Helper()
 	cmd := exec.CommandContext(ctx, "socat", "-D", "STDIO", "pty,link=/tmp/faketty")
 	r, err := cmd.StderrPipe()
-	require.NoError(t, err)
-	require.NoError(t, cmd.Start())
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if err := cmd.Start(); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 	// Let our fake serial port node appear.
 	// socat will write to stderr before starting transfer phase;
 	// we don't really care what, just that it did, because then it's ready.
 	buf := make([]byte, 1024)
-	_, err = r.Read(buf)
-	require.NoError(t, err)
+	if _, err = r.Read(buf); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 	return cmd
 }
 
@@ -43,7 +47,9 @@ func TestSerialReadAndCloseConcurrency(t *testing.T) {
 	go cmd.Wait()
 
 	port, err := Open("/tmp/faketty", &Mode{})
-	require.NoError(t, err)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 	buf := make([]byte, 100)
 	go port.Read(buf)
 	// let port.Read to start
@@ -58,7 +64,13 @@ func TestDoubleCloseIsNoop(t *testing.T) {
 	go cmd.Wait()
 
 	port, err := Open("/tmp/faketty", &Mode{})
-	require.NoError(t, err)
-	require.NoError(t, port.Close())
-	require.NoError(t, port.Close())
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if err := port.Close(); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if err := port.Close(); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 }