diff --git a/Cargo.lock b/Cargo.lock
index 886f314b6194..5bdaed13303f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -497,15 +497,6 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
 
-[[package]]
-name = "castaway"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0abae9be0aaf9ea96a3b1b8b1b55c602ca751eba1b1500220cea4ecbafe7c0d5"
-dependencies = [
- "rustversion",
-]
-
 [[package]]
 name = "cc"
 version = "1.2.5"
@@ -690,20 +681,6 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
-[[package]]
-name = "compact_str"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b79c4069c6cad78e2e0cdfcbd26275770669fb39fd308a752dc110e83b9af32"
-dependencies = [
- "castaway",
- "cfg-if",
- "itoa",
- "rustversion",
- "ryu",
- "static_assertions",
-]
-
 [[package]]
 name = "concurrent-queue"
 version = "2.5.0"
@@ -3312,12 +3289,6 @@ dependencies = [
  "untrusted",
 ]
 
-[[package]]
-name = "rustversion"
-version = "1.0.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7c45b9784283f1b2e7fb61b42047c2fd678ef0960d4f6f1eba131594cc369d4"
-
 [[package]]
 name = "rustybuzz"
 version = "0.7.0"
@@ -3667,12 +3638,6 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
 
-[[package]]
-name = "static_assertions"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
-
 [[package]]
 name = "strict-num"
 version = "0.1.1"
@@ -5301,7 +5266,6 @@ name = "uv-pep508"
 version = "0.6.0"
 dependencies = [
  "boxcar",
- "compact_str",
  "indexmap",
  "insta",
  "itertools 0.14.0",
@@ -5342,7 +5306,6 @@ dependencies = [
 name = "uv-platform-tags"
 version = "0.0.1"
 dependencies = [
- "compact_str",
  "insta",
  "rustc-hash",
  "serde",
diff --git a/crates/uv-pep508/Cargo.toml b/crates/uv-pep508/Cargo.toml
index 35dfd73d7657..912a226f7c0d 100644
--- a/crates/uv-pep508/Cargo.toml
+++ b/crates/uv-pep508/Cargo.toml
@@ -36,7 +36,6 @@ tracing = { workspace = true, optional = true }
 unicode-width = { workspace = true }
 url = { workspace = true, features = ["serde"] }
 version-ranges = { workspace = true }
-compact_str = { version = "0.8.1" }
 
 [dev-dependencies]
 insta = { version = "1.40.0" }
diff --git a/crates/uv-pep508/src/lib.rs b/crates/uv-pep508/src/lib.rs
index 95f4a4774c4e..17233c137d86 100644
--- a/crates/uv-pep508/src/lib.rs
+++ b/crates/uv-pep508/src/lib.rs
@@ -963,10 +963,10 @@ fn parse_pep508_requirement<T: Pep508Url>(
 mod tests {
     //! Half of these tests are copied from <https://github.com/pypa/packaging/pull/624>
 
+    use insta::assert_snapshot;
     use std::env;
     use std::str::FromStr;
-
-    use insta::assert_snapshot;
+    use std::sync::Arc;
     use url::Url;
 
     use uv_normalize::{ExtraName, InvalidNameError, PackageName};
@@ -1339,17 +1339,17 @@ mod tests {
         let mut b = MarkerTree::expression(MarkerExpression::String {
             key: MarkerValueString::SysPlatform,
             operator: MarkerOperator::Equal,
-            value: "win32".to_string(),
+            value: Arc::from("win32"),
         });
         let mut c = MarkerTree::expression(MarkerExpression::String {
             key: MarkerValueString::OsName,
             operator: MarkerOperator::Equal,
-            value: "linux".to_string(),
+            value: Arc::from("linux"),
         });
         let d = MarkerTree::expression(MarkerExpression::String {
             key: MarkerValueString::ImplementationName,
             operator: MarkerOperator::Equal,
-            value: "cpython".to_string(),
+            value: Arc::from("cpython"),
         });
 
         c.and(d);
diff --git a/crates/uv-platform-tags/Cargo.toml b/crates/uv-platform-tags/Cargo.toml
index a0138f3a55dd..add9e485634b 100644
--- a/crates/uv-platform-tags/Cargo.toml
+++ b/crates/uv-platform-tags/Cargo.toml
@@ -16,7 +16,6 @@ doctest = false
 workspace = true
 
 [dependencies]
-compact_str = { version = "0.8.1" }
 rustc-hash = { workspace = true }
 serde = { workspace = true }
 thiserror = { workspace = true }