diff --git a/unit/test-eapol.c b/unit/test-eapol.c
index 58f3e054..144c2d56 100644
--- a/unit/test-eapol.c
+++ b/unit/test-eapol.c
@@ -3923,6 +3923,16 @@ static bool aes_precheck(const void *data)
 
 static bool pkcs8_precheck(const void *data)
 {
+	struct stat s;
+
+	/* Despite the path, this directory exists whether the module
+	 * is external or built-in. */
+	if (stat ("/sys/module/pkcs8_key_parser", &s) != 0)
+		return false;
+
+	if (!S_ISDIR (s.st_mode))
+		return false;
+
 	return (IS_ENABLED(HAVE_PKCS8_SUPPORT) &&
 		l_cipher_is_supported(L_CIPHER_AES) &&
 		l_cipher_is_supported(L_CIPHER_AES_CBC) &&