diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index 6fbd93c..0e2f1e5 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.20
+          go-version: 1.18
 
       - run: go test ./... -coverprofile cover.out
 
diff --git a/go.mod b/go.mod
index 504f5bf..5513ba4 100644
--- a/go.mod
+++ b/go.mod
@@ -1,11 +1,3 @@
 module github.com/broothie/option
 
-go 1.20
-
-require github.com/stretchr/testify v1.8.4
-
-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
-)
+go 1.18
diff --git a/go.sum b/go.sum
index fa4b6e6..e69de29 100644
--- a/go.sum
+++ b/go.sum
@@ -1,10 +0,0 @@
-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/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-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=
diff --git a/option_test.go b/option_test.go
index 3970b98..351b0fc 100644
--- a/option_test.go
+++ b/option_test.go
@@ -4,9 +4,6 @@ import (
 	"errors"
 	"net/url"
 	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 )
 
 type Client struct {
@@ -37,23 +34,34 @@ func TestApply(t *testing.T) {
 	t.Run("applies options", func(t *testing.T) {
 		apiKey := "foo-api-key"
 		baseURL, err := url.Parse("https://example.com")
-		require.NoError(t, err)
+		requireNoError(t, err)
 
-		client, err := Apply[Client](Client{},
+		got, err := Apply[Client](Client{},
 			OptionAPIKey(apiKey),
 			OptionBaseURL(baseURL.String()),
 		)
-		require.NoError(t, err)
+		requireNoError(t, err)
 
-		assert.Equal(t, Client{APIKey: apiKey, BaseURL: baseURL}, client)
+		want := Client{APIKey: apiKey, BaseURL: baseURL}
+		if got.APIKey != want.APIKey || got.BaseURL.String() != want.BaseURL.String() {
+			t.Errorf("got: %v, want: %v", got, want)
+		}
 	})
 
-	t.Run("collects errors", func(t *testing.T) {
-		_, err := Apply[Client](Client{},
-			OptionBaseURL("%"),
+	t.Run("fails on error", func(t *testing.T) {
+		_, got := Apply[Client](Client{},
 			Func[Client](func(Client) (Client, error) { return Client{}, errors.New("foo error") }),
 		)
 
-		assert.EqualError(t, err, "failed to apply option 0: parse \"%\": invalid URL escape \"%\"\nfailed to apply option 1: foo error")
+		want := "failed to apply option 0: foo error"
+		if got.Error() != want {
+			t.Errorf("got: %v, want: %v", got, want)
+		}
 	})
 }
+
+func requireNoError(t *testing.T, err error) {
+	if err != nil {
+		t.Fatalf("error when none expected: %v", err)
+	}
+}
diff --git a/options.go b/options.go
index ef99c73..7a08030 100644
--- a/options.go
+++ b/options.go
@@ -1,7 +1,6 @@
 package option
 
 import (
-	"errors"
 	"fmt"
 )
 
@@ -20,13 +19,12 @@ func NewOptions[T any](options ...Option[T]) Options[T] {
 
 // Apply applies a list of options to t.
 func (o Options[T]) Apply(t T) (T, error) {
-	var errs []error
 	for i, option := range o {
 		var err error
 		if t, err = option.Apply(t); err != nil {
-			errs = append(errs, fmt.Errorf("failed to apply option %d: %w", i, err))
+			return t, fmt.Errorf("failed to apply option %d: %w", i, err)
 		}
 	}
 
-	return t, errors.Join(errs...)
+	return t, nil
 }