diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKey.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKey.kt
index 726ff644..ea899c2b 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKey.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKey.kt
@@ -4,8 +4,10 @@
 
 package org.pgpainless.key.generation
 
-import org.bouncycastle.bcpg.attr.ImageAttribute
+import java.io.IOException
+import java.io.InputStream
 import java.util.*
+import org.bouncycastle.bcpg.attr.ImageAttribute
 import org.bouncycastle.openpgp.PGPSecretKey
 import org.bouncycastle.openpgp.PGPSecretKeyRing
 import org.bouncycastle.openpgp.PGPUserAttributeSubpacketVector
@@ -19,8 +21,6 @@ import org.pgpainless.key.generation.type.KeyType
 import org.pgpainless.key.protection.SecretKeyRingProtector
 import org.pgpainless.policy.Policy
 import org.pgpainless.signature.subpackets.SelfSignatureSubpackets
-import java.io.File
-import java.io.IOException
 
 /**
  * OpenPGP key builder. This implementation supersedes the old [KeyRingBuilder].
@@ -41,16 +41,14 @@ open class GenerateOpenPgpKey(
         protected val preferences: AlgorithmSuite
     ) {
 
-        /**
-         * Make sure, that the chosen [KeyType] is allowed.
-         */
+        /** Make sure, that the chosen [KeyType] is allowed. */
         open fun sanitizePublicKeyAlgorithms(keyType: KeyType, policy: Policy) {
             verifyAlgorithmComplianceWithPolicy(keyType, policy)
         }
 
         /**
-         * Make sure, that the chosen [KeyType] complies to the given [Policy] by comparing it to the
-         * [Policy.PublicKeyAlgorithmPolicy].
+         * Make sure, that the chosen [KeyType] complies to the given [Policy] by comparing it to
+         * the [Policy.PublicKeyAlgorithmPolicy].
          *
          * @throws IllegalArgumentException if [keyType] fails to be accepted by [policy]
          */
@@ -73,7 +71,8 @@ open class GenerateOpenPgpKey(
     fun buildV4Key(
         keyType: KeyType,
         flags: List<KeyFlag>? = listOf(KeyFlag.CERTIFY_OTHER)
-    ): V4GenerateOpenPgpKey = V4GenerateOpenPgpKey(keyType, flags, policy, referenceTime, preferences)
+    ): V4GenerateOpenPgpKey =
+        V4GenerateOpenPgpKey(keyType, flags, policy, referenceTime, preferences)
 
     /**
      * Builder for version 4 OpenPGP keys.
@@ -146,24 +145,22 @@ open class GenerateOpenPgpKey(
         }
 
         /**
-         * Add the contents of a JPEG file as image attribute to the key.
+         * Add the contents of a JPEG input stream as image attribute to the key.
          *
-         * @param jpegFile file containing a JPEG image
-         * @param subpacketsCallback callback to modify the user-attribute binding signature subpackets.
+         * @param jpegInputStream input stream containing a JPEG image
+         * @param subpacketsCallback callback to modify the user-attribute binding signature
+         *   subpackets.
          * @return this
          */
         @Throws(IOException::class)
         fun addJpegImage(
-            jpegFile: File,
+            jpegInputStream: InputStream,
             subpacketsCallback: SelfSignatureSubpackets.Callback = SelfSignatureSubpackets.nop()
         ) = apply {
-            jpegFile.inputStream()
-                .let { Streams.readAll(it) }
-                .let {
-                    PGPUserAttributeSubpacketVectorGenerator().apply {
-                        setImageAttribute(ImageAttribute.JPEG, it)
-                    }.generate()
-                }.let { addUserAttribute(it, subpacketsCallback) }
+            PGPUserAttributeSubpacketVectorGenerator()
+                .apply { setImageAttribute(ImageAttribute.JPEG, Streams.readAll(jpegInputStream)) }
+                .generate()
+                .let { addUserAttribute(it, subpacketsCallback) }
         }
 
         /**
diff --git a/pgpainless-core/src/test/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKeyTest.kt b/pgpainless-core/src/test/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKeyTest.kt
index 978924c4..20cf8ba2 100644
--- a/pgpainless-core/src/test/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKeyTest.kt
+++ b/pgpainless-core/src/test/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKeyTest.kt
@@ -1,9 +1,15 @@
+// SPDX-FileCopyrightText: 2024 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
 package org.pgpainless.key.generation
 
 import org.bouncycastle.bcpg.attr.ImageAttribute
 import org.bouncycastle.openpgp.PGPUserAttributeSubpacketVectorGenerator
+import org.junit.jupiter.api.Assertions.assertTrue
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.assertThrows
+import org.opentest4j.TestAbortedException
 import org.pgpainless.PGPainless
 import org.pgpainless.algorithm.KeyFlag
 import org.pgpainless.algorithm.PublicKeyAlgorithm
@@ -14,6 +20,7 @@ import org.pgpainless.key.generation.type.xdh.XDHSpec
 import org.pgpainless.key.protection.SecretKeyRingProtector
 import org.pgpainless.policy.Policy
 import org.pgpainless.util.DateUtil
+import java.io.InputStream
 
 class GenerateOpenPgpKeyTest {
 
@@ -27,7 +34,8 @@ class GenerateOpenPgpKeyTest {
                 .addUserAttribute(
                     PGPUserAttributeSubpacketVectorGenerator()
                         .apply { setImageAttribute(ImageAttribute.JPEG, byteArrayOf()) }
-                        .generate())
+                        .generate(),
+                )
                 .addEncryptionSubkey(KeyType.XDH(XDHSpec._X25519))
                 .addSigningSubkey(KeyType.EDDSA(EdDSACurve._Ed25519))
                 .build(SecretKeyRingProtector.unprotectedKeys())
@@ -59,7 +67,8 @@ class GenerateOpenPgpKeyTest {
         val policy =
             Policy(
                 publicKeyAlgorithmPolicy =
-                    Policy.PublicKeyAlgorithmPolicy(mapOf(PublicKeyAlgorithm.RSA_GENERAL to 4096)))
+                Policy.PublicKeyAlgorithmPolicy(mapOf(PublicKeyAlgorithm.RSA_GENERAL to 4096)),
+            )
         val builder = GenerateOpenPgpKey(policy)
 
         assertThrows<IllegalArgumentException> {
@@ -74,8 +83,17 @@ class GenerateOpenPgpKeyTest {
 
     @Test
     fun testKeyGenerationWithJPEGAttribute() {
-        GenerateOpenPgpKey(Policy.getInstance())
+        val key = GenerateOpenPgpKey(Policy.getInstance())
             .buildV4Key(KeyType.EDDSA(EdDSACurve._Ed25519))
-            .addJpegImage()
+            .addJpegImage(requireResource("suzanne.jpg"))
+            .build()
+
+        assertTrue(key.publicKey.userAttributes.hasNext())
+    }
+
+    private fun requireResource(resourceName: String): InputStream {
+        return javaClass.classLoader.getResourceAsStream(resourceName)
+            ?: throw TestAbortedException(
+                "Cannot read resource $resourceName: InputStream is null.")
     }
 }
diff --git a/pgpainless-core/src/test/resources/suzanne.jpg b/pgpainless-core/src/test/resources/suzanne.jpg
new file mode 100644
index 00000000..c343ef09
Binary files /dev/null and b/pgpainless-core/src/test/resources/suzanne.jpg differ