diff --git a/.golangci.yaml b/.golangci.yaml
index 59dd309..b4f8404 100644
--- a/.golangci.yaml
+++ b/.golangci.yaml
@@ -1,3 +1,4 @@
-linters:
+version: "2"
+formatters:
   enable:
     - gofumpt
diff --git a/internal/cmd/config_set_test.go b/internal/cmd/config_set_test.go
index 315cc6d..a03d677 100644
--- a/internal/cmd/config_set_test.go
+++ b/internal/cmd/config_set_test.go
@@ -44,8 +44,8 @@ func TestNewConfigSetCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w, args := s.setup(t)
diff --git a/internal/cmd/create_env_test.go b/internal/cmd/create_env_test.go
index af3a00f..7f7d845 100644
--- a/internal/cmd/create_env_test.go
+++ b/internal/cmd/create_env_test.go
@@ -53,8 +53,8 @@ func TestNewCreateEnvCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w, args := s.setup(t)
diff --git a/internal/cmd/create_test.go b/internal/cmd/create_test.go
index 2081de0..bc59062 100644
--- a/internal/cmd/create_test.go
+++ b/internal/cmd/create_test.go
@@ -53,8 +53,8 @@ func TestNewCreateCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w, args := s.setup(t)
diff --git a/internal/cmd/edit_env_test.go b/internal/cmd/edit_env_test.go
index e077189..8586a69 100644
--- a/internal/cmd/edit_env_test.go
+++ b/internal/cmd/edit_env_test.go
@@ -44,8 +44,8 @@ func TestNewEditEnvCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w, args := s.setup(t)
diff --git a/internal/cmd/edit_test.go b/internal/cmd/edit_test.go
index 3129c4c..7ce0857 100644
--- a/internal/cmd/edit_test.go
+++ b/internal/cmd/edit_test.go
@@ -44,8 +44,8 @@ func TestNewEditCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w, args := s.setup(t)
diff --git a/internal/cmd/fix_test.go b/internal/cmd/fix_test.go
index aa327ae..66f112e 100644
--- a/internal/cmd/fix_test.go
+++ b/internal/cmd/fix_test.go
@@ -42,8 +42,8 @@ func TestNewFixCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w := s.setup(t)
diff --git a/internal/cmd/global_get.go b/internal/cmd/global_get.go
index 70b795f..a447647 100644
--- a/internal/cmd/global_get.go
+++ b/internal/cmd/global_get.go
@@ -17,7 +17,7 @@ func newGlobalGetCmd(workspaceManager workspaceManager, completionManager comple
 			case "config-dir":
 				cmd.Printf("%s", workspaceManager.GetConfigDir())
 			default:
-				return fmt.Errorf("Key '%s' does not exist", args[0])
+				return fmt.Errorf("key '%s' does not exist", args[0])
 			}
 			return nil
 		},
diff --git a/internal/cmd/global_get_test.go b/internal/cmd/global_get_test.go
index b75a93d..7b3108a 100644
--- a/internal/cmd/global_get_test.go
+++ b/internal/cmd/global_get_test.go
@@ -40,8 +40,8 @@ func TestNewGlobalGetCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w, args := s.setup(t)
diff --git a/internal/cmd/list_test.go b/internal/cmd/list_test.go
index 759c2b3..a5d3e33 100644
--- a/internal/cmd/list_test.go
+++ b/internal/cmd/list_test.go
@@ -68,8 +68,8 @@ func TestNewListCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w := s.setup(t)
diff --git a/internal/cmd/remove_test.go b/internal/cmd/remove_test.go
index e4973ce..a2c4967 100644
--- a/internal/cmd/remove_test.go
+++ b/internal/cmd/remove_test.go
@@ -44,8 +44,8 @@ func TestNewRemoveCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w, args := s.setup(t)
diff --git a/internal/cmd/root_test.go b/internal/cmd/root_test.go
index 1c98b74..5282451 100644
--- a/internal/cmd/root_test.go
+++ b/internal/cmd/root_test.go
@@ -17,8 +17,8 @@ func TestNewWorkspaceManager(t *testing.T) {
 		{
 			"Missing VISUAL or EDITOR variable",
 			func(t *testing.T) {
-				os.Unsetenv("VISUAL")
-				os.Unsetenv("EDITOR")
+				assert.NoError(t, os.Unsetenv("VISUAL"))
+				assert.NoError(t, os.Unsetenv("EDITOR"))
 			},
 			func(t *testing.T, w workspaceManager, err error) {
 				assert.Error(t, err)
@@ -27,8 +27,8 @@ func TestNewWorkspaceManager(t *testing.T) {
 		{
 			"Missing SHELL variable",
 			func(t *testing.T) {
-				os.Setenv("VISUAL", "emacs")
-				os.Unsetenv("SHELL")
+				assert.NoError(t, os.Setenv("VISUAL", "emacs"))
+				assert.NoError(t, os.Unsetenv("SHELL"))
 			},
 			func(t *testing.T, w workspaceManager, err error) {
 				assert.Error(t, err)
@@ -37,9 +37,9 @@ func TestNewWorkspaceManager(t *testing.T) {
 		{
 			"Customize the config directory",
 			func(t *testing.T) {
-				os.Setenv("VISUAL", "emacs")
-				os.Setenv("SHELL", "/bin/bash")
-				os.Setenv("WO_CONFIG_PATH", os.TempDir())
+				assert.NoError(t, os.Setenv("VISUAL", "emacs"))
+				assert.NoError(t, os.Setenv("SHELL", "/bin/bash"))
+				assert.NoError(t, os.Setenv("WO_CONFIG_PATH", os.TempDir()))
 			},
 			func(t *testing.T, w workspaceManager, err error) {
 				assert.NoError(t, err)
diff --git a/internal/cmd/run_test.go b/internal/cmd/run_test.go
index 45d737c..d57c33c 100644
--- a/internal/cmd/run_test.go
+++ b/internal/cmd/run_test.go
@@ -43,8 +43,8 @@ func TestNewRunCmd(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			w, args := s.setup(t)
 			cmd := newRunCmd(w, newMockCompletionManager(t))
 			cmd.SetArgs(args)
diff --git a/internal/cmd/setup_test.go b/internal/cmd/setup_test.go
index 429d20c..3cd91f6 100644
--- a/internal/cmd/setup_test.go
+++ b/internal/cmd/setup_test.go
@@ -206,8 +206,8 @@ export WO_THEME=light
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w := s.setup(t)
diff --git a/internal/cmd/show_test.go b/internal/cmd/show_test.go
index 84b64f7..a1410ee 100644
--- a/internal/cmd/show_test.go
+++ b/internal/cmd/show_test.go
@@ -134,8 +134,8 @@ Envs
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.Setenv("EDITOR", "emacs")
-			os.Setenv("SHELL", "/bin/sh")
+			assert.NoError(t, os.Setenv("EDITOR", "emacs"))
+			assert.NoError(t, os.Setenv("SHELL", "/bin/sh"))
 			errBuf := &bytes.Buffer{}
 			outBuf := &bytes.Buffer{}
 			w, args := s.setup(t)
diff --git a/internal/workspace/workspace_test.go b/internal/workspace/workspace_test.go
index d6132f7..9f207d4 100644
--- a/internal/workspace/workspace_test.go
+++ b/internal/workspace/workspace_test.go
@@ -78,7 +78,7 @@ func TestNewWorkspaceManager(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			visual, editor, shell := s.setup()
 			manager, err := NewWorkspaceManager(WithEditor(editor, visual), WithShellPath(shell), WithConfigPath(config.getPath(t)))
 			s.test(t, manager, err)
@@ -127,7 +127,7 @@ func TestList(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			s.setup(t, w)
@@ -215,7 +215,7 @@ test_func2() {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			s.setup(t, w)
@@ -301,7 +301,7 @@ func TestCreate(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			projectPath := s.setup(t, w)
@@ -350,7 +350,7 @@ func TestCreateEnv(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			assert.NoError(t, w.Create("test", project.getPath(t)))
@@ -385,7 +385,7 @@ func TestEdit(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			exec := NewMockCommander(t)
@@ -423,7 +423,7 @@ func TestEditEnv(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			err = w.Create("test", project.getPath(t))
@@ -513,7 +513,7 @@ end
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath(s.shell), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			err = w.Create("test", project.getPath(t))
@@ -568,7 +568,7 @@ func TestRemove(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			err = w.Create("test", project.getPath(t))
@@ -624,7 +624,7 @@ func TestFix(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			err = w.Create("test", project.getPath(t))
@@ -701,7 +701,7 @@ func TestSetConfig(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			err = w.Create("test", project.getPath(t))
@@ -734,7 +734,7 @@ func TestBuildAliases(t *testing.T) {
 	}
 	for _, s := range scenarios {
 		t.Run(s.name, func(t *testing.T) {
-			os.RemoveAll(config.getPath(t))
+			assert.NoError(t, os.RemoveAll(config.getPath(t)))
 			w, err := NewWorkspaceManager(WithEditor("emacs", "emacs"), WithShellPath("/bin/bash"), WithConfigPath(config.getPath(t)))
 			assert.NoError(t, err)
 			testProjectPath := fmt.Sprintf("%s/test", project.getPath(t))