diff --git a/Cargo.lock b/Cargo.lock
index ae9cbea..69cc39b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,21 +2,6 @@
 # It is not intended for manual editing.
 version = 3
 
-[[package]]
-name = "addr2line"
-version = "0.21.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
-dependencies = [
- "gimli",
-]
-
-[[package]]
-name = "adler"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
-
 [[package]]
 name = "anyhow"
 version = "1.0.86"
@@ -35,21 +20,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
-[[package]]
-name = "backtrace"
-version = "0.3.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2089b7e3f35b9dd2d0ed921ead4f6d318c27680d4a5bd167b3ee120edb105837"
-dependencies = [
- "addr2line",
- "cc",
- "cfg-if",
- "libc",
- "miniz_oxide",
- "object",
- "rustc-demangle",
-]
-
 [[package]]
 name = "base16ct"
 version = "0.2.0"
@@ -607,12 +577,6 @@ dependencies = [
  "wasi",
 ]
 
-[[package]]
-name = "gimli"
-version = "0.28.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
-
 [[package]]
 name = "givre"
 version = "0.1.1"
@@ -638,7 +602,6 @@ dependencies = [
  "anyhow",
  "bitcoin",
  "ed25519-dalek",
- "futures",
  "generic-tests",
  "givre",
  "hex",
@@ -649,7 +612,6 @@ dependencies = [
  "round-based",
  "secp256k1",
  "test-case",
- "tokio",
 ]
 
 [[package]]
@@ -764,15 +726,6 @@ version = "2.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
 
-[[package]]
-name = "miniz_oxide"
-version = "0.7.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d811f3e15f28568be3407c8e7fdb6514c1cda3cb30683f15b6a1a1dc4ea14a7"
-dependencies = [
- "adler",
-]
-
 [[package]]
 name = "num-bigint"
 version = "0.4.4"
@@ -808,15 +761,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "object"
-version = "0.32.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6a622008b6e321afc04970976f62ee297fdbaa6f95318ca343e3eebb9648441"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "phantom-type"
 version = "0.3.1"
@@ -968,12 +912,6 @@ dependencies = [
  "syn 1.0.109",
 ]
 
-[[package]]
-name = "rustc-demangle"
-version = "0.1.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
-
 [[package]]
 name = "rustc_version"
 version = "0.4.0"
@@ -1236,28 +1174,6 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
 
-[[package]]
-name = "tokio"
-version = "1.36.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61285f6515fa018fb2d1e46eb21223fff441ee8db5d0f1435e8ab4f5cdb80931"
-dependencies = [
- "backtrace",
- "pin-project-lite",
- "tokio-macros",
-]
-
-[[package]]
-name = "tokio-macros"
-version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b8a1e28f2deaa14e508979454cb3a223b10b938b45af148bc0986de36f1923b"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.48",
-]
-
 [[package]]
 name = "tracing"
 version = "0.1.40"
diff --git a/tests/Cargo.toml b/tests/Cargo.toml
index 285252a..5f217d5 100644
--- a/tests/Cargo.toml
+++ b/tests/Cargo.toml
@@ -11,16 +11,14 @@ givre = { path = "../givre", features = ["all-ciphersuites", "cggmp21-keygen", "
 
 generic-tests = "0.1"
 test-case = "3.3"
-rand_dev = "0.1"
 
 rand = "0.8"
 rand_core = "0.6"
+rand_dev = "0.1"
 
 hex = "0.4"
 hex-literal = "0.4"
 
-tokio = { version = "1", features = ["macros", "rt"]}
-futures = "0.3"
 round-based = { workspace = true, features = ["sim"] }
 
 ed25519 = { package = "ed25519-dalek", version = "2.1" }
diff --git a/tests/tests/it/interactive.rs b/tests/tests/it/interactive.rs
index 1def3f6..037d851 100644
--- a/tests/tests/it/interactive.rs
+++ b/tests/tests/it/interactive.rs
@@ -1,4 +1,4 @@
-#[generic_tests::define(attrs(test_case::case, tokio::test))]
+#[generic_tests::define(attrs(test_case::case))]
 mod generic {
     use anyhow::Context;
     use givre::Ciphersuite;
@@ -11,8 +11,7 @@ mod generic {
     #[test_case::case(Some(3), 5; "t3n5")]
     #[test_case::case(Some(5), 5; "t5n5")]
     #[test_case::case(None, 5; "n5")]
-    #[tokio::test]
-    async fn keygen_sign<C: Ciphersuite + ExternalVerifier>(t: Option<u16>, n: u16) {
+    fn keygen_sign<C: Ciphersuite + ExternalVerifier>(t: Option<u16>, n: u16) {
         let mut rng = rand_dev::DevRng::new();
 
         // --- Keygen