diff --git a/internal/integrationtest/compile_4/lib_caching_test.go b/internal/integrationtest/compile_4/lib_caching_test.go
new file mode 100644
index 00000000000..1a497da7747
--- /dev/null
+++ b/internal/integrationtest/compile_4/lib_caching_test.go
@@ -0,0 +1,60 @@
+// This file is part of arduino-cli.
+//
+// Copyright 2024 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to license@arduino.cc.
+
+package compile
+
+import (
+	"testing"
+
+	"github.com/arduino/arduino-cli/internal/integrationtest"
+	"github.com/arduino/go-paths-helper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestBuildCacheLibWithNonASCIIChars(t *testing.T) {
+	// See: https://github.com/arduino/arduino-cli/issues/2671
+
+	env, cli := integrationtest.CreateArduinoCLIWithEnvironment(t)
+	t.Cleanup(env.CleanUp)
+
+	tmpUserDir, err := paths.MkTempDir("", "Håkan")
+	require.NoError(t, err)
+	t.Cleanup(func() { tmpUserDir.RemoveAll() })
+	customEnv := cli.GetDefaultEnv()
+	customEnv["ARDUINO_DIRECTORIES_USER"] = tmpUserDir.String()
+
+	// Install Arduino AVR Boards and Servo lib
+	_, _, err = cli.Run("core", "install", "arduino:avr@1.8.6")
+	require.NoError(t, err)
+	_, _, err = cli.RunWithCustomEnv(customEnv, "lib", "install", "Servo")
+	require.NoError(t, err)
+
+	// Make a temp sketch
+	sketchDir := tmpUserDir.Join("ServoSketch")
+	sketchFile := sketchDir.Join("ServoSketch.ino")
+	require.NoError(t, sketchDir.Mkdir())
+	require.NoError(t, sketchFile.WriteFile(
+		[]byte("#include <Servo.h>\nvoid setup() {}\nvoid loop() {}\n"),
+	))
+
+	// Compile sketch
+	_, _, err = cli.RunWithCustomEnv(customEnv, "compile", "-b", "arduino:avr:uno", sketchFile.String())
+	require.NoError(t, err)
+
+	// Compile sketch again
+	out, _, err := cli.RunWithCustomEnv(customEnv, "compile", "-b", "arduino:avr:uno", "-v", sketchFile.String())
+	require.NoError(t, err)
+	require.Contains(t, string(out), "Compiling library \"Servo\"\nUsing previously compiled file")
+}