diff --git a/lib/src/androidTest/java/at/bitfire/vcard4android/IOUtils.kt b/lib/src/androidTest/java/at/bitfire/vcard4android/IOUtils.kt
new file mode 100644
index 0000000..63c5fb2
--- /dev/null
+++ b/lib/src/androidTest/java/at/bitfire/vcard4android/IOUtils.kt
@@ -0,0 +1,6 @@
+package at.bitfire.vcard4android
+
+object IOUtils {
+    fun resourceToByteArray(resource: String): ByteArray =
+        this::class.java.getResourceAsStream(resource)!!.use { it.readBytes() }
+}
diff --git a/lib/src/androidTest/java/at/bitfire/vcard4android/contactrow/PhotoBuilderTest.kt b/lib/src/androidTest/java/at/bitfire/vcard4android/contactrow/PhotoBuilderTest.kt
index bc8d607..c79e59c 100644
--- a/lib/src/androidTest/java/at/bitfire/vcard4android/contactrow/PhotoBuilderTest.kt
+++ b/lib/src/androidTest/java/at/bitfire/vcard4android/contactrow/PhotoBuilderTest.kt
@@ -16,8 +16,8 @@ import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.rule.GrantPermissionRule
 import at.bitfire.vcard4android.AndroidContact
 import at.bitfire.vcard4android.Contact
+import at.bitfire.vcard4android.IOUtils
 import at.bitfire.vcard4android.impl.TestAddressBook
-import org.apache.commons.io.IOUtils
 import org.junit.Assert.*
 import org.junit.BeforeClass
 import org.junit.ClassRule
diff --git a/lib/src/androidTest/java/at/bitfire/vcard4android/contactrow/PhotoHandlerTest.kt b/lib/src/androidTest/java/at/bitfire/vcard4android/contactrow/PhotoHandlerTest.kt
index 004995e..1ab1f0b 100644
--- a/lib/src/androidTest/java/at/bitfire/vcard4android/contactrow/PhotoHandlerTest.kt
+++ b/lib/src/androidTest/java/at/bitfire/vcard4android/contactrow/PhotoHandlerTest.kt
@@ -16,8 +16,8 @@ import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.rule.GrantPermissionRule
 import at.bitfire.vcard4android.AndroidContact
 import at.bitfire.vcard4android.Contact
+import at.bitfire.vcard4android.IOUtils
 import at.bitfire.vcard4android.impl.TestAddressBook
-import org.apache.commons.io.IOUtils
 import org.junit.Assert
 import org.junit.Assert.*
 import org.junit.BeforeClass