diff --git a/clidocstool_man_test.go b/clidocstool_man_test.go
index f847250..7a4fc68 100644
--- a/clidocstool_man_test.go
+++ b/clidocstool_man_test.go
@@ -25,8 +25,6 @@ import (
 	"time"
 
 	"github.com/spf13/cobra/doc"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 )
 
 //nolint:errcheck
@@ -35,10 +33,15 @@ func TestGenManTree(t *testing.T) {
 	tmpdir := t.TempDir()
 
 	epoch, err := time.Parse("2006-Jan-02", "2020-Jan-10")
-	require.NoError(t, err)
+	if err != nil {
+		t.Fatal(err)
+	}
 	t.Setenv("SOURCE_DATE_EPOCH", strconv.FormatInt(epoch.Unix(), 10))
 
-	require.NoError(t, copyFile(path.Join("fixtures", "buildx_stop.pre.md"), path.Join(tmpdir, "buildx_stop.md")))
+	err = copyFile(path.Join("fixtures", "buildx_stop.pre.md"), path.Join(tmpdir, "buildx_stop.md"))
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	c, err := New(Options{
 		Root:      dockerCmd,
@@ -51,8 +54,14 @@ func TestGenManTree(t *testing.T) {
 			Manual:  "Docker User Manuals",
 		},
 	})
-	require.NoError(t, err)
-	require.NoError(t, c.GenManTree(dockerCmd))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = c.GenManTree(dockerCmd)
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	seen := make(map[string]struct{})
 	remanpage := regexp.MustCompile(`\.\d+$`)
@@ -65,14 +74,19 @@ func TestGenManTree(t *testing.T) {
 		}
 		t.Run(fname, func(t *testing.T) {
 			seen[fname] = struct{}{}
-			require.NoError(t, err)
 
 			bres, err := os.ReadFile(filepath.Join(tmpdir, fname))
-			require.NoError(t, err)
+			if err != nil {
+				t.Fatal(err)
+			}
 
 			bexc, err := os.ReadFile(path)
-			require.NoError(t, err)
-			assert.Equal(t, string(bexc), string(bres))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if string(bexc) != string(bres) {
+				t.Fatalf("expected:\n%s\ngot:\n%s", string(bexc), string(bres))
+			}
 		})
 		return nil
 	})
diff --git a/clidocstool_md_test.go b/clidocstool_md_test.go
index 2abf72c..1ff7d06 100644
--- a/clidocstool_md_test.go
+++ b/clidocstool_md_test.go
@@ -21,8 +21,6 @@ import (
 	"path/filepath"
 	"strings"
 	"testing"
-
-	"github.com/stretchr/testify/require"
 )
 
 //nolint:errcheck
@@ -30,15 +28,23 @@ func TestGenMarkdownTree(t *testing.T) {
 	setup()
 	tmpdir := t.TempDir()
 
-	require.NoError(t, copyFile(path.Join("fixtures", "buildx_stop.pre.md"), path.Join(tmpdir, "buildx_stop.md")))
+	err := copyFile(path.Join("fixtures", "buildx_stop.pre.md"), path.Join(tmpdir, "buildx_stop.md"))
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	c, err := New(Options{
 		Root:      dockerCmd,
 		SourceDir: tmpdir,
 		Plugin:    false,
 	})
-	require.NoError(t, err)
-	require.NoError(t, c.GenMarkdownTree(dockerCmd))
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = c.GenMarkdownTree(dockerCmd)
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	seen := make(map[string]struct{})
 
@@ -50,14 +56,19 @@ func TestGenMarkdownTree(t *testing.T) {
 		}
 		t.Run(fname, func(t *testing.T) {
 			seen[fname] = struct{}{}
-			require.NoError(t, err)
 
 			bres, err := os.ReadFile(filepath.Join(tmpdir, fname))
-			require.NoError(t, err)
+			if err != nil {
+				t.Fatal(err)
+			}
 
 			bexc, err := os.ReadFile(path)
-			require.NoError(t, err)
-			require.Equal(t, string(bexc), string(bres))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if string(bexc) != string(bres) {
+				t.Fatalf("expected:\n%s\ngot:\n%s", string(bexc), string(bres))
+			}
 		})
 		return nil
 	})
diff --git a/clidocstool_test.go b/clidocstool_test.go
index 12bd3a1..713d775 100644
--- a/clidocstool_test.go
+++ b/clidocstool_test.go
@@ -27,8 +27,6 @@ import (
 	"github.com/docker/cli-docs-tool/annotation"
 	"github.com/spf13/cobra"
 	"github.com/spf13/cobra/doc"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 )
 
 var (
@@ -249,15 +247,22 @@ func TestGenAllTree(t *testing.T) {
 	tmpdir := t.TempDir()
 
 	// keep for testing
-	//tmpdir, err := os.MkdirTemp("", "cli-docs-tools")
-	//require.NoError(t, err)
-	//t.Log(tmpdir)
+	// tmpdir, err := os.MkdirTemp("", "cli-docs-tools")
+	// if err != nil {
+	// 	t.Fatal(err)
+	// }
+	// t.Log(tmpdir)
 
 	epoch, err := time.Parse("2006-Jan-02", "2020-Jan-10")
-	require.NoError(t, err)
+	if err != nil {
+		t.Fatal(err)
+	}
 	t.Setenv("SOURCE_DATE_EPOCH", strconv.FormatInt(epoch.Unix(), 10))
 
-	require.NoError(t, copyFile(path.Join("fixtures", "buildx_stop.pre.md"), path.Join(tmpdir, "buildx_stop.md")))
+	err = copyFile(path.Join("fixtures", "buildx_stop.pre.md"), path.Join(tmpdir, "buildx_stop.md"))
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	c, err := New(Options{
 		Root:      dockerCmd,
@@ -270,12 +275,17 @@ func TestGenAllTree(t *testing.T) {
 			Manual:  "Docker User Manuals",
 		},
 	})
-	require.NoError(t, err)
-	require.NoError(t, c.GenAllTree())
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = c.GenAllTree()
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	seen := make(map[string]struct{})
 
-	_ = filepath.Walk("fixtures", func(path string, info fs.FileInfo, err error) error {
+	_ = filepath.Walk("fixtures", func(path string, info fs.FileInfo, _ error) error {
 		fname := filepath.Base(path)
 		// ignore dirs and .pre.md files
 		if info.IsDir() || strings.HasSuffix(fname, ".pre.md") {
@@ -283,14 +293,19 @@ func TestGenAllTree(t *testing.T) {
 		}
 		t.Run(fname, func(t *testing.T) {
 			seen[fname] = struct{}{}
-			require.NoError(t, err)
 
 			bres, err := os.ReadFile(filepath.Join(tmpdir, fname))
-			require.NoError(t, err)
+			if err != nil {
+				t.Fatal(err)
+			}
 
 			bexc, err := os.ReadFile(path)
-			require.NoError(t, err)
-			assert.Equal(t, string(bexc), string(bres))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if string(bexc) != string(bres) {
+				t.Fatalf("expected:\n%s\ngot:\n%s", string(bexc), string(bres))
+			}
 		})
 		return nil
 	})
diff --git a/clidocstool_yaml_test.go b/clidocstool_yaml_test.go
index e412fb0..6d5d379 100644
--- a/clidocstool_yaml_test.go
+++ b/clidocstool_yaml_test.go
@@ -20,9 +20,6 @@ import (
 	"path/filepath"
 	"strings"
 	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 )
 
 //nolint:errcheck
@@ -35,8 +32,13 @@ func TestGenYamlTree(t *testing.T) {
 		SourceDir: tmpdir,
 		Plugin:    false,
 	})
-	require.NoError(t, err)
-	require.NoError(t, c.GenYamlTree(dockerCmd))
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = c.GenYamlTree(dockerCmd)
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	seen := make(map[string]struct{})
 
@@ -48,14 +50,19 @@ func TestGenYamlTree(t *testing.T) {
 		}
 		t.Run(fname, func(t *testing.T) {
 			seen[fname] = struct{}{}
-			require.NoError(t, err)
 
 			bres, err := os.ReadFile(filepath.Join(tmpdir, fname))
-			require.NoError(t, err)
+			if err != nil {
+				t.Fatal(err)
+			}
 
 			bexc, err := os.ReadFile(path)
-			require.NoError(t, err)
-			assert.Equal(t, string(bexc), string(bres))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if string(bexc) != string(bres) {
+				t.Fatalf("expected:\n%s\ngot:\n%s", string(bexc), string(bres))
+			}
 		})
 		return nil
 	})
diff --git a/go.mod b/go.mod
index 5955c4d..d86d5c3 100644
--- a/go.mod
+++ b/go.mod
@@ -5,15 +5,11 @@ go 1.23.0
 require (
 	github.com/spf13/cobra v1.10.2
 	github.com/spf13/pflag v1.0.10
-	github.com/stretchr/testify v1.9.0
 	go.yaml.in/yaml/v3 v3.0.4
 )
 
 require (
 	github.com/cpuguy83/go-md2man/v2 v2.0.7 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 063cb7a..8138810 100644
--- a/go.sum
+++ b/go.sum
@@ -1,12 +1,8 @@
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/cpuguy83/go-md2man/v2 v2.0.7 h1:zbFlGlXEAKlwXpmvle3d8Oe3YnkKIK4xSRTd3sHPnBo=
 github.com/cpuguy83/go-md2man/v2 v2.0.7/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
-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/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
-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/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/spf13/cobra v1.10.2 h1:DMTTonx5m65Ic0GOoRY2c16WCbHxOOw6xxezuLaBpcU=
@@ -14,11 +10,7 @@ github.com/spf13/cobra v1.10.2/go.mod h1:7C1pvHqHw5A4vrJfjNwvOdzYu0Gml16OCs2GRiT
 github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
 github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
-github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
 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 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=