diff --git a/Cargo.toml b/Cargo.toml
index f8d6e7f9..7db4c2f1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -84,6 +84,5 @@ crossbeam-utils = "0.8"
 fastrand = "2"
 paste = "1"
 quickcheck = { default-features = false, git = "https://github.com/taiki-e/quickcheck.git", branch = "dev" } # https://github.com/BurntSushi/quickcheck/pull/304 + https://github.com/BurntSushi/quickcheck/pull/282 + lower MSRV
-serde_test = "1"
 sptr = "0.3"
 static_assertions = "1"
diff --git a/src/tests/mod.rs b/src/tests/mod.rs
index 3a14c0e4..1e1555f2 100644
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@@ -318,8 +318,7 @@ LLVM version: 15.0.3",
 #[cfg(feature = "serde")]
 #[test]
 fn test_serde() {
-    use serde_test::{assert_tokens, Token};
-    use test_helper::serde::DebugPartialEq;
+    use test_helper::serde::{assert_tokens, DebugPartialEq, Token};
 
     macro_rules! t {
         ($atomic_type:ty, $value_type:ident, $token_type:ident) => {
@@ -346,7 +345,7 @@ fn test_serde() {
     t!(AtomicU32, u32, U32);
     t!(AtomicI64, i64, I64);
     t!(AtomicU64, u64, U64);
-    // TODO: serde_test doesn't support Token::{I128,U128}
+    // TODO: serde_test doesn't support Token::{I128,U128}: https://github.com/serde-rs/test/pull/6
     // t!(AtomicI128, i128, I128);
     // t!(AtomicU128, u128, U128);
     #[cfg(feature = "float")]
diff --git a/tests/helper/Cargo.toml b/tests/helper/Cargo.toml
index e84f4e1d..3e999c7d 100644
--- a/tests/helper/Cargo.toml
+++ b/tests/helper/Cargo.toml
@@ -11,12 +11,13 @@ doc = false
 test = false
 
 [features]
-std = ["critical-section", "fs-err", "serde", "libc", "windows-sys"]
+std = ["critical-section", "fs-err", "serde", "serde_test", "libc", "windows-sys"]
 
 [dependencies]
 critical-section = { version = "1", optional = true, features = ["restore-state-bool"] }
 fs-err = { version = "2", optional = true }
 serde = { version = "1", optional = true }
+serde_test = { version = "1", optional = true }
 
 [target.'cfg(unix)'.dependencies]
 libc = { version = "0.2.140", optional = true }
diff --git a/tests/helper/src/serde.rs b/tests/helper/src/serde.rs
index a21714fd..f35deb06 100644
--- a/tests/helper/src/serde.rs
+++ b/tests/helper/src/serde.rs
@@ -1,6 +1,7 @@
 use std::fmt;
 
 use serde::{Deserialize, Serialize};
+pub use serde_test::*;
 
 #[derive(Debug)]
 pub struct DebugPartialEq<T>(pub T);