diff --git a/LICENSE.md b/LICENSE.md
index 8b48609..1b44338 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -29,7 +29,7 @@ Verbatim copies of both licenses are included below:
 ```
                                  Apache License
                            Version 2.0, January 2004
-                        http://www.apache.org/licenses/
+                        https://www.apache.org/licenses/
 
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
diff --git a/pkg/container/serial_test.go b/pkg/container/serial_test.go
index e2d3d94..fea2efe 100644
--- a/pkg/container/serial_test.go
+++ b/pkg/container/serial_test.go
@@ -130,12 +130,6 @@ func BenchmarkContainerSerialisation(b *testing.B) {
 	}
 }
 
-func randBytes(n int) []byte {
-	b := make([]byte, n)
-	_, _ = rand.Read(b)
-	return b
-}
-
 func randDID() (crypto.PrivKey, did.DID) {
 	privKey, _, err := crypto.GenerateEd25519Key(rand.Reader)
 	if err != nil {
@@ -150,7 +144,7 @@ func randDID() (crypto.PrivKey, did.DID) {
 
 func randomString(length int) string {
 	b := make([]byte, length/2+1)
-	rand.Read(b)
+	_, _ = rand.Read(b)
 	return fmt.Sprintf("%x", b)[0:length]
 }
 
diff --git a/pkg/meta/meta_test.go b/pkg/meta/meta_test.go
index 7b1d994..9ad3e2c 100644
--- a/pkg/meta/meta_test.go
+++ b/pkg/meta/meta_test.go
@@ -4,8 +4,9 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/require"
-	"github.com/ucan-wg/go-ucan/pkg/meta"
 	"gotest.tools/v3/assert"
+
+	"github.com/ucan-wg/go-ucan/pkg/meta"
 )
 
 func TestMeta_Add(t *testing.T) {
diff --git a/pkg/policy/selector/selector.go b/pkg/policy/selector/selector.go
index d75607a..149078d 100644
--- a/pkg/policy/selector/selector.go
+++ b/pkg/policy/selector/selector.go
@@ -1,7 +1,6 @@
 package selector
 
 import (
-	"errors"
 	"fmt"
 	"math"
 	"strconv"
@@ -11,7 +10,6 @@ import (
 	"github.com/ipld/go-ipld-prime/datamodel"
 	"github.com/ipld/go-ipld-prime/fluent/qp"
 	"github.com/ipld/go-ipld-prime/node/basicnode"
-	"github.com/ipld/go-ipld-prime/schema"
 )
 
 // Selector describes a UCAN policy selector, as specified here:
@@ -302,23 +300,6 @@ func kindString(n datamodel.Node) string {
 	return n.Kind().String()
 }
 
-func isMissing(err error) bool {
-	if _, ok := err.(datamodel.ErrNotExists); ok {
-		return true
-	}
-	if _, ok := err.(schema.ErrNoSuchField); ok {
-		return true
-	}
-	if _, ok := err.(schema.ErrInvalidKey); ok {
-		return true
-	}
-	return false
-}
-
-func IsResolutionErr(err error) bool {
-	return errors.As(err, &resolutionerr{})
-}
-
 type resolutionerr struct {
 	msg string
 	at  []string
diff --git a/pkg/policy/selector/selector_test.go b/pkg/policy/selector/selector_test.go
index 4795efb..5da0231 100644
--- a/pkg/policy/selector/selector_test.go
+++ b/pkg/policy/selector/selector_test.go
@@ -1,6 +1,7 @@
 package selector
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 	"testing"
@@ -144,7 +145,6 @@ func TestSelect(t *testing.T) {
 		fmt.Println(err)
 
 		require.ErrorAs(t, err, &resolutionerr{}, "error should be a resolution error")
-		require.True(t, IsResolutionErr(err))
 	})
 
 	t.Run("optional not exists", func(t *testing.T) {
@@ -364,7 +364,7 @@ func FuzzParseAndSelect(f *testing.F) {
 
 		// look for panic()
 		_, err = sel.Select(node)
-		if err != nil && !IsResolutionErr(err) {
+		if err != nil && !errors.As(err, &resolutionerr{}) {
 			// not normal, we should only have resolution errors
 			t.Fatal(err)
 		}
diff --git a/pkg/policy/selector/supported_test.go b/pkg/policy/selector/supported_test.go
index 6a7b087..db22216 100644
--- a/pkg/policy/selector/supported_test.go
+++ b/pkg/policy/selector/supported_test.go
@@ -101,7 +101,6 @@ func TestSupportedForms(t *testing.T) {
 			// attempt to select
 			res, err := sel.Select(makeNode(t, tc.Input))
 			require.Error(t, err)
-			require.True(t, selector.IsResolutionErr(err))
 			require.Nil(t, res)
 		})
 	}