diff --git a/bind/bind_test.go b/bind/bind_test.go
index 96288a4e2..8b15325b3 100644
--- a/bind/bind_test.go
+++ b/bind/bind_test.go
@@ -21,9 +21,11 @@ import (
 	"path"
 	"path/filepath"
 	"runtime"
+	"slices"
 	"strings"
 	"testing"
 
+	"golang.org/x/exp/slices"
 	"golang.org/x/mobile/internal/importers"
 	"golang.org/x/mobile/internal/importers/java"
 	"golang.org/x/mobile/internal/importers/objc"
@@ -287,7 +289,7 @@ func genJavaPackages(t *testing.T, dir string, cg *ClassGen) {
 func TestGenJava(t *testing.T) {
 	allTests := tests
 	if java.IsAvailable() {
-		allTests = append(append([]string{}, allTests...), javaTests...)
+		allTests = slices.Concat(allTests, javaTests)
 	}
 	for _, filename := range allTests {
 		var pkg *types.Package
diff --git a/cmd/gomobile/build.go b/cmd/gomobile/build.go
index a8f0ad2cc..e74b22911 100644
--- a/cmd/gomobile/build.go
+++ b/cmd/gomobile/build.go
@@ -14,6 +14,7 @@ import (
 	"os"
 	"os/exec"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -338,7 +339,7 @@ func goCmdAt(at string, subcmd string, srcs []string, env []string, args ...stri
 	if gmc, err := goModCachePath(); err == nil {
 		env = append([]string{"GOMODCACHE=" + gmc}, env...)
 	} else {
-		env = append([]string{}, env...)
+		env = slices.Clone(env)
 	}
 	cmd.Env = env
 	cmd.Dir = at
@@ -356,7 +357,7 @@ func goModTidyAt(at string, env []string) error {
 	if gmc, err := goModCachePath(); err == nil {
 		env = append([]string{"GOMODCACHE=" + gmc}, env...)
 	} else {
-		env = append([]string{}, env...)
+		env = slices.Clone(env)
 	}
 	cmd.Env = env
 	cmd.Dir = at