diff --git a/pkcs12/Cargo.toml b/pkcs12/Cargo.toml
index 520356ab1..d51772343 100644
--- a/pkcs12/Cargo.toml
+++ b/pkcs12/Cargo.toml
@@ -14,9 +14,6 @@ readme = "README.md"
 edition = "2021"
 rust-version = "1.65"
 
-[features]
-alloc = []
-
 [dependencies]
 cfg-if = "1.0.0"
 digest = { version = "0.10.7", features=["alloc"] }
diff --git a/pkcs12/src/kdf.rs b/pkcs12/src/kdf.rs
index 4ac584814..fc4ba1b22 100644
--- a/pkcs12/src/kdf.rs
+++ b/pkcs12/src/kdf.rs
@@ -1,7 +1,7 @@
 //! Implementation of the key derivation function
 //! [RFC 7292 Appendix B](https://datatracker.ietf.org/doc/html/rfc7292#appendix-B)
 
-use alloc::vec::Vec;
+use alloc::{vec, vec::Vec};
 use digest::{core_api::BlockSizeUser, Digest, FixedOutputReset, OutputSizeUser, Update};
 use zeroize::Zeroize;
 
diff --git a/pkcs12/tests/kdf.rs b/pkcs12/tests/kdf.rs
index acdfdf659..f5954dd73 100644
--- a/pkcs12/tests/kdf.rs
+++ b/pkcs12/tests/kdf.rs
@@ -1,10 +1,13 @@
-#![cfg(feature = "alloc")]
-
+/// Test cases for the key derivation functions.
+/// All test cases have been verified against openssl's method `PKCS12_key_gen_utf8`.
+/// See https://github.com/xemwebe/test_pkcs12_kdf for a sample program.
+///
+
+use hex_literal::hex;
+use pkcs12::kdf::{derive_key, Pkcs12KeyType};
+ 
 #[test]
 fn pkcs12_key_derive_sha256() {
-    use hex_literal::hex;
-    use pkcs12::kdf::{derive_key, Pkcs12KeyType};
-
     const PASS_SHORT: &str = "ge@äheim";
     const SALT_INC: [u8; 8] = [0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8];
 
@@ -123,3 +126,16 @@ fn pkcs12_key_derive_whirlpool() {
         hex!("3324282adb468bff0734d3b7e399094ec8500cb5b0a3604055da107577aaf766")
     );
 }
+
+#[test]
+fn pkcs12_key_derive_special_chars() {
+    const PASS_SHORT: &str = "🔥";
+    const SALT_INC: [u8; 8] = [0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8];
+
+    assert_eq!(
+        derive_key::<sha2::Sha256>(PASS_SHORT, &SALT_INC, Pkcs12KeyType::EncryptionKey, 100, 32),
+        hex!("d01e72a940b4b1a7a5707fc8264a60cb7606ff9051dedff90930687d2513c006")
+    );
+}
+
+