diff --git a/Cargo.lock b/Cargo.lock
index d1bb9b97c..6ea18d669 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -685,9 +685,9 @@ dependencies = [
 
 [[package]]
 name = "async-compression"
-version = "0.4.47"
+version = "0.4.48"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef217a77a86a6e3dab9a5b3c81dc445b603fe743a90c1cb10a2f2144628d8cfa"
+checksum = "fb61aea1a7def73ee7c350a184f0e70b32c182344e2e75bf70c9b621b83417fd"
 dependencies = [
  "compression-codecs",
  "compression-core",
@@ -812,7 +812,7 @@ checksum = "82f6aeea286b8eb4dd3431a1be1b59d290ace00f5bfd8e2a159bc2a05e2c1667"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -961,9 +961,9 @@ dependencies = [
 
 [[package]]
 name = "aws-runtime"
-version = "1.9.2"
+version = "1.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef47857a1d4488b528f4a5d5715fa7c3300820897824152234d3fa22b1426657"
+checksum = "25b43ad47adc2517efe3d706559d94b97e50e80e0321b3cadbc9f77cee88adcd"
 dependencies = [
  "aws-credential-types",
  "aws-sigv4",
@@ -989,9 +989,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-kms"
-version = "1.118.0"
+version = "1.120.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c243864bc3754be9f0001414e0162fdf1370fa62c70b0cfbe1da6a6221d553c7"
+checksum = "d6b0fe38fee2ba5b6cd24d32d08365b314ae1adea123649e061a7eb6300b6f5b"
 dependencies = [
  "arc-swap",
  "aws-credential-types",
@@ -1015,9 +1015,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-s3"
-version = "1.146.1"
+version = "1.148.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2cd651b4400d4011b8927b83a9552bf90ff11e6e5da0b9f0a7583247aceec971"
+checksum = "8a61c1db3987ab6c8740fb87f248864687d50549401115244a84f02c3047b2d5"
 dependencies = [
  "arc-swap",
  "aws-credential-types",
@@ -1052,9 +1052,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-sso"
-version = "1.109.0"
+version = "1.111.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3cfe74df5d9ad2fedd691973ad3521ebf4f27a3c68c792556686aedb5519bab"
+checksum = "65700d75f6da78c89a61a49f1539979400a4609d3329376b1dc2133d7a1b2b90"
 dependencies = [
  "arc-swap",
  "aws-credential-types",
@@ -1078,9 +1078,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-ssooidc"
-version = "1.111.0"
+version = "1.113.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81b0ec31ed6191bd11350aae4b2004198f2db21350cb0a20c57e0a92e55dd161"
+checksum = "eb1147c254af7b6cee3ace90ae7da6f21366ce9a9b899035fa8a0fdf586eb75a"
 dependencies = [
  "arc-swap",
  "aws-credential-types",
@@ -1104,9 +1104,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-sts"
-version = "1.114.0"
+version = "1.116.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef45745026107ec30c4ef86bd8ae4b002e7e5f6a86e4225240bdf6b06a0b944a"
+checksum = "035c7392e751d20bf1060d625d023587eb14099646110a9cff7c697bfe4b253a"
 dependencies = [
  "arc-swap",
  "aws-credential-types",
@@ -1131,9 +1131,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sigv4"
-version = "1.5.1"
+version = "1.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "723c2234ad7511ceef63eab016b7ba6ff7c55590fefb96fa8467af014a07309f"
+checksum = "31d955e76ff96acd555bf06fa0fa6d5bf9335fa84ae7c64481b20ae61d231f70"
 dependencies = [
  "aws-credential-types",
  "aws-smithy-eventstream",
@@ -1737,7 +1737,7 @@ dependencies = [
  "prettyplease 0.3.0",
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -1996,9 +1996,9 @@ dependencies = [
 
 [[package]]
 name = "cfg-if"
-version = "1.0.4"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
+checksum = "4e7648175b45a9a48536d676f68d918270699102aa8dab5496df06904c914600"
 
 [[package]]
 name = "cfg_aliases"
@@ -2141,7 +2141,7 @@ dependencies = [
  "heck 0.5.0",
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2222,9 +2222,9 @@ dependencies = [
 
 [[package]]
 name = "compression-codecs"
-version = "0.4.42"
+version = "0.4.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "257c7085cbb71be72d8fb97edff08b03d86d5d9f2222b9cc34a6bec87093bc10"
+checksum = "bef16c47ba2797aa6a909cc37d39911f3a6743811fe7408ac0b0cc0276b656e9"
 dependencies = [
  "brotli 8.0.4",
  "bzip2",
@@ -2798,7 +2798,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2842,7 +2842,7 @@ checksum = "2ac7135c3ef02b2f7833bbeb1be5ba7f966dcde8a87c6b87f65a778d71a02785"
 dependencies = [
  "darling_core 0.24.1",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -3343,7 +3343,7 @@ checksum = "3a711bd5a06ec85d9683e142d28a98ad0679a7220669f5c1b8589e57e9b29e46"
 dependencies = [
  "datafusion-doc",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -3715,7 +3715,7 @@ checksum = "2e2b94854e8576378ccda7c8de8a66ed8b4e8acbd2c50ec3418ea6c8aaf4b567"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -3991,7 +3991,7 @@ checksum = "c6232dd377dcc64799954cbd3a9bb882e9cdc1308ccd87b1c098f1fb2eaf82a8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -4597,7 +4597,7 @@ checksum = "9fb9654ba8355388abeb8dcb4fc62f511300867002afc858860463bdd9fe0c44"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -5306,9 +5306,9 @@ dependencies = [
 
 [[package]]
 name = "hotpath"
-version = "0.25.1"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "366c5db5a8e4643bdde121a1d6f35cfa035e7850b8b8ea94c6960a139d44e93a"
+checksum = "f37234f85a8d1bda6b84d486245dd0847c5b33cca10d5f3691375e66704de0f8"
 dependencies = [
  "arc-swap",
  "async-channel",
@@ -5318,7 +5318,7 @@ dependencies = [
  "flate2",
  "futures-channel",
  "futures-core",
- "futures-util",
+ "futures-sink",
  "hdrhistogram",
  "hotpath-macros",
  "http 1.5.0",
@@ -5339,9 +5339,9 @@ dependencies = [
 
 [[package]]
 name = "hotpath-macros"
-version = "0.25.1"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "846bde0d9600d98434e1aac376977d7718bfe3d2f5312a041b7c59a6a466c51a"
+checksum = "2ac39b5517f540cab511bdbd5a4dc8cfc62858d6cd26a095463c1d2acfb3f290"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -6751,7 +6751,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -8220,7 +8220,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2bfe0f4c752e450fc2faf62654f1c134747922825d5b04ca717b8874f41a40c0"
 dependencies = [
  "proc-macro2",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -9054,7 +9054,7 @@ checksum = "92ecd8964f8453721699a1ed72037b0db49ce2f5a5138486ee89bed6f67cdf3a"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -11111,9 +11111,9 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "1.1.4"
+version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
+checksum = "891efababe418670775f199f0d233d84843c227a0949a883ce15b37c78d6629d"
 dependencies = [
  "bitflags 2.13.2",
  "errno",
@@ -11258,9 +11258,9 @@ checksum = "9774ba4a74de5f7b1c1451ed6cd5285a32eddb5cccb8cc655a4e50009e06477f"
 
 [[package]]
 name = "s3s"
-version = "0.16.0"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d29a4db6a51f1cd3269a36354ce4aa7db2be8816cee42a642b9c85cd3769577"
+checksum = "87d22507a8ebd0ea64972c76dfedbc477418dc70afd98bfce928263894067d2f"
 dependencies = [
  "arc-swap",
  "arrayvec",
@@ -11317,9 +11317,9 @@ dependencies = [
 
 [[package]]
 name = "s3s-rfc2047"
-version = "0.16.0"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9370a2f353a7929b79ae7b5f692b4758c59aa19526b18feff6a977e8ff17da5a"
+checksum = "f9d3e6b36be7cca3da377b4cabcd668ffe5b16c3b73a83f7a8f7b63ff6a178ee"
 dependencies = [
  "base64-simd",
  "thiserror 2.0.20",
@@ -11327,9 +11327,9 @@ dependencies = [
 
 [[package]]
 name = "s3s-sigv2"
-version = "0.16.0"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f277b63ffc9a2135c49d52726199b7436c2f86746d625496984f5bb5cabef050"
+checksum = "d96880b5ad8d639c9224155126741708aeb62ad3682e0476d2fd14290af808ef"
 dependencies = [
  "base64-simd",
  "hmac 0.13.0",
@@ -11341,9 +11341,9 @@ dependencies = [
 
 [[package]]
 name = "s3s-sigv4"
-version = "0.16.0"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a979a401f6ae4035bc22e4ac0f7a9a5923ba93841c931e8e28652fe211d991bc"
+checksum = "fed605cbaaa1cf4d82e8ee15098fb3e42d49c92bb6215eb1359f63bfc0c6b020"
 dependencies = [
  "arrayvec",
  "base64-simd",
@@ -11575,7 +11575,7 @@ checksum = "e7a5d71263a5a7d47b41f6b3f06ba276f10cc18b0931f1799f710578e2309348"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -11639,7 +11639,7 @@ checksum = "8d3b1629de253c70a0508c3899572da79ca359fdab27c7920ff00406df418906"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -11684,7 +11684,7 @@ dependencies = [
  "darling 0.24.1",
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -11719,7 +11719,7 @@ checksum = "a22144e767da4ddd8416dbf383700542ffd8a5dc493dfecedfe1fe3ad03c98ae"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -12316,9 +12316,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "3.0.5"
+version = "3.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12df2e0110f65b775f769bb17ef989067a1d931b2eb822bd4346631eeada89f9"
+checksum = "8593e8e72159ed2257d083c7a454a85cbf854f37a0966d8d483aff8c8a3ebcee"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -12365,7 +12365,7 @@ checksum = "901704edd0dfe137f1987838ee4f259e4e063c31371bdb423f7ae38ec6f77f02"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -12559,7 +12559,7 @@ checksum = "bc04cd3e1236dd4a98afca4569f2deb3f120e5422a4023be2cb683f8486292af"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -12696,7 +12696,7 @@ checksum = "78773a2a397f451582ce068015985c33193cf6dea8b74d2a639fe457b2f07b0e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -13212,9 +13212,9 @@ checksum = "5c1cb5db39152898a79168971543b1cb5020dff7fe43c8dc468b0885f5e29df5"
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.24"
+version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
+checksum = "d245f478577f809a851594d02313b640fb437e0bb33866753cff937863096954"
 
 [[package]]
 name = "unicode-normalization"
@@ -13456,7 +13456,7 @@ dependencies = [
  "bumpalo",
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
  "wasm-bindgen-shared",
 ]
 
@@ -14031,7 +14031,7 @@ checksum = "33811428bee40dbceb6d545e95754741d17a6aef9a4849f0fd62e2ba4f412a78"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
  "synstructure 0.14.0",
 ]
 
@@ -14072,7 +14072,7 @@ checksum = "f75b4683f6c7f45248d4d64056a24298c6281e0993356d7d1b4a1a962ef10d4a"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
  "synstructure 0.14.0",
 ]
 
@@ -14126,7 +14126,7 @@ checksum = "34df6fc39dbd26ddc9c10e6a2984476e13acce22e64e4487636ef494369225da"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 7e13ba392..9f54a3087 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -145,7 +145,7 @@ rustfs-zip = { path = "./crates/zip", version = "1.0.1" }
 async-channel = "2.5.0"
 async_zip = { default-features = false, version = "0.0.19" }
 mysql_async = { default-features = false, version = "0.37.1" }
-async-compression = { version = "0.4.47" }
+async-compression = { version = "0.4.48" }
 async-recursion = "1.1.1"
 async-trait = "0.1.92"
 async-nats = { version = "0.50.0", default-features = false }
@@ -244,9 +244,9 @@ atoi = "3.1.0"
 atomic_enum = "0.3.0"
 aws-config = { version = "1.12.0" }
 aws-credential-types = { version = "1.3.0" }
-aws-sdk-kms = { default-features = false, version = "1.118.0" }
-aws-sdk-s3 = { default-features = false, version = "1.146.1" }
-aws-sdk-sts = { default-features = false, version = "1.114.0" }
+aws-sdk-kms = { default-features = false, version = "1.120.0" }
+aws-sdk-s3 = { default-features = false, version = "1.148.0" }
+aws-sdk-sts = { default-features = false, version = "1.116.0" }
 aws-smithy-async = { version = "1.3.0" }
 aws-smithy-http-client = { default-features = false, version = "1.4.2" }
 aws-smithy-runtime-api = { version = "1.16.2" }
@@ -310,11 +310,11 @@ regex = { version = "1.13.1" }
 rumqttc = { package = "rumqttc-next", version = "0.34.0" }
 redis = { version = "1.7.0" }
 rustify = { version = "0.7", default-features = false }
-rustix = { version = "1.1.4" }
+rustix = { version = "1.1.5" }
 rust-embed = { version = "8.12.0" }
 rustc-hash = { version = "2.1.3" }
-s3s = { version = "0.16.0", features = ["minio"] }
-s3s-sigv4 = { version = "0.16.0" }
+s3s = { version = "0.16.1", features = ["minio"] }
+s3s-sigv4 = { version = "0.16.1" }
 serial_test = "4.0.1"
 shadow-rs = { default-features = false, version = "2.0.0" }
 siphasher = "1.0.3"
@@ -375,7 +375,7 @@ dav-server = "0.11.0"
 # Performance Analysis and Memory Profiling
 rustfs-mimalloc = { version = "0.5.4" }
 # Preserve Unicode focus filters until rustfs/backlog#2302 is resolved.
-hotpath = { version = "0.25.1", default-features = false }
+hotpath = { version = "0.26.0", default-features = false }
 # Snapshot testing for output format regression detection
 insta = { version = "1.48" }
 
diff --git a/rustfs/src/app/object/request_body/tests/protocol.rs b/rustfs/src/app/object/request_body/tests/protocol.rs
index 773411521..320df6fb5 100644
--- a/rustfs/src/app/object/request_body/tests/protocol.rs
+++ b/rustfs/src/app/object/request_body/tests/protocol.rs
@@ -90,36 +90,42 @@ struct SignedRequest {
 /// Constructs a real SigV4 fixture using the production crypto primitives.
 /// S3S verifies both the request authorization and every signed chunk.
 fn signed_request(payload: &[u8], unsigned_trailer: bool) -> SignedRequest {
-    use rustfs_utils::{hex_sha256, hmac_sha256};
-
     const DATE: &str = "20130524T000000Z";
     const SCOPE: &str = "20130524/us-east-1/s3/aws4_request";
+    const REGION: &str = "us-east-1";
+    const SERVICE: &str = "s3";
+    const SECRET_KEY: &str = "test-secret";
     let mode = if unsigned_trailer {
         "STREAMING-UNSIGNED-PAYLOAD-TRAILER"
     } else {
         "STREAMING-AWS4-HMAC-SHA256-PAYLOAD"
     };
-    let signed_headers = "host;x-amz-content-sha256;x-amz-date;x-amz-decoded-content-length";
-    let headers = format!(
-        "host:s3.amazonaws.com\nx-amz-content-sha256:{mode}\nx-amz-date:{DATE}\nx-amz-decoded-content-length:{}\n",
-        payload.len()
-    );
-    let canonical = format!("PUT\n/test-bucket/test-key\npartNumber=1&uploadId=test-upload\n{headers}\n{signed_headers}\n{mode}");
-    let key = hmac_sha256("AWS4test-secret", "20130524");
-    let key = hmac_sha256(key, "us-east-1");
-    let key = hmac_sha256(key, "s3");
-    let key = hmac_sha256(key, "aws4_request");
-    let digest = |data: &[u8]| hex_sha256(data, str::to_owned);
-    let encode = |data: [u8; 32]| hex_simd::encode_to_string(data, hex_simd::AsciiCase::Lower);
-    let seed = encode(hmac_sha256(
-        key,
-        format!("AWS4-HMAC-SHA256\n{DATE}\n{SCOPE}\n{}", digest(canonical.as_bytes())),
-    ));
+    let decoded_length = payload.len().to_string();
+    let mut signed_headers = vec![
+        ("content-encoding", "aws-chunked"),
+        ("host", "s3.amazonaws.com"),
+        ("x-amz-content-sha256", mode),
+        ("x-amz-date", DATE),
+        ("x-amz-decoded-content-length", decoded_length.as_str()),
+    ];
+    if unsigned_trailer {
+        signed_headers.push(("x-amz-trailer", "x-amz-checksum-crc32"));
+    }
+    signed_headers.sort_unstable_by(|lhs, rhs| lhs.0.cmp(rhs.0));
+    let signed_header_names = signed_headers.iter().map(|(name, _)| *name).collect::<Vec<_>>().join(";");
+    let query = [("partNumber", "1"), ("uploadId", "test-upload")];
+    let payload_mode = if unsigned_trailer {
+        s3s_sigv4::Payload::UnsignedMultipleChunksWithTrailer
+    } else {
+        s3s_sigv4::Payload::MultipleChunks
+    };
+    let date = s3s_sigv4::AmzDate::parse(DATE).expect("fixture date");
+    let canonical = s3s_sigv4::create_canonical_request("PUT", "/test-bucket/test-key", &query, &signed_headers, payload_mode);
+    let string_to_sign = s3s_sigv4::create_string_to_sign(&canonical, &date, REGION, SERVICE);
+    let seed = s3s_sigv4::calculate_signature(&string_to_sign, SECRET_KEY, &date, REGION, SERVICE);
     let chunk_signature = |previous: &str, data: &[u8]| {
-        encode(hmac_sha256(
-            key,
-            format!("AWS4-HMAC-SHA256-PAYLOAD\n{DATE}\n{SCOPE}\n{previous}\n{}\n{}", digest(b""), digest(data)),
-        ))
+        let string_to_sign = s3s_sigv4::create_chunk_string_to_sign(&date, REGION, SERVICE, previous, &[data]);
+        s3s_sigv4::calculate_signature(&string_to_sign, SECRET_KEY, &date, REGION, SERVICE)
     };
     let (prefix, suffix) = if unsigned_trailer {
         (
@@ -147,7 +153,7 @@ fn signed_request(payload: &[u8], unsigned_trailer: bool) -> SignedRequest {
         .header("x-amz-decoded-content-length", payload.len())
         .header(
             "authorization",
-            format!("AWS4-HMAC-SHA256 Credential=test-access/{SCOPE}, SignedHeaders={signed_headers}, Signature={seed}"),
+            format!("AWS4-HMAC-SHA256 Credential=test-access/{SCOPE}, SignedHeaders={signed_header_names}, Signature={seed}"),
         );
     if unsigned_trailer {
         builder = builder.header("x-amz-trailer", "x-amz-checksum-crc32");