diff --git a/Cargo.lock b/Cargo.lock
index 9a87f6a75..c631e6ad1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4206,6 +4206,7 @@ dependencies = [
  "url",
  "urlencoding",
  "uv-once-map",
+ "uv-static",
  "wiremock",
 ]
 
diff --git a/crates/uv-auth/Cargo.toml b/crates/uv-auth/Cargo.toml
index ea63f5125..24d75582b 100644
--- a/crates/uv-auth/Cargo.toml
+++ b/crates/uv-auth/Cargo.toml
@@ -26,6 +26,8 @@ tracing = { workspace = true }
 url = { workspace = true }
 urlencoding = { workspace = true }
 
+uv-static = { workspace = true }
+
 [dev-dependencies]
 tempfile = { workspace = true }
 tokio = { workspace = true }
diff --git a/crates/uv-auth/src/credentials.rs b/crates/uv-auth/src/credentials.rs
index 144b8c64e..91aa48103 100644
--- a/crates/uv-auth/src/credentials.rs
+++ b/crates/uv-auth/src/credentials.rs
@@ -9,6 +9,8 @@ use std::io::Read;
 use std::io::Write;
 use url::Url;
 
+use uv_static::EnvVars;
+
 #[derive(Clone, Debug, PartialEq)]
 pub struct Credentials {
     /// The name of the user for authentication.
@@ -145,8 +147,8 @@ impl Credentials {
     /// `UV_HTTP_BASIC_PYTORCH_PASSWORD`.
     pub fn from_env(name: &str) -> Option<Self> {
         let name = name.to_uppercase();
-        let username = std::env::var(format!("UV_HTTP_BASIC_{name}_USERNAME")).ok();
-        let password = std::env::var(format!("UV_HTTP_BASIC_{name}_PASSWORD")).ok();
+        let username = std::env::var(EnvVars::http_basic_username(&name)).ok();
+        let password = std::env::var(EnvVars::http_basic_password(&name)).ok();
         if username.is_none() && password.is_none() {
             None
         } else {
diff --git a/crates/uv-cli/src/lib.rs b/crates/uv-cli/src/lib.rs
index 8343e0270..d51686d28 100644
--- a/crates/uv-cli/src/lib.rs
+++ b/crates/uv-cli/src/lib.rs
@@ -3880,7 +3880,7 @@ pub struct IndexArgs {
     /// All indexes provided via this flag take priority over the index specified by
     /// `--default-index` (which defaults to PyPI). When multiple `--index` flags are
     /// provided, earlier values take priority.
-    #[arg(long, env = "UV_INDEX", value_delimiter = ' ', value_parser = parse_index, help_heading = "Index options")]
+    #[arg(long, env = EnvVars::UV_INDEX, value_delimiter = ' ', value_parser = parse_index, help_heading = "Index options")]
     pub index: Option<Vec<Maybe<Index>>>,
 
     /// The URL of the default package index (by default: <https://pypi.org/simple>).
@@ -3890,7 +3890,7 @@ pub struct IndexArgs {
     ///
     /// The index given by this flag is given lower priority than all other indexes specified via
     /// the `--index` flag.
-    #[arg(long, env = "UV_DEFAULT_INDEX", value_parser = parse_default_index, help_heading = "Index options")]
+    #[arg(long, env = EnvVars::UV_DEFAULT_INDEX, value_parser = parse_default_index, help_heading = "Index options")]
     pub default_index: Option<Maybe<Index>>,
 
     /// (Deprecated: use `--default-index` instead) The URL of the Python package index (by default: <https://pypi.org/simple>).
diff --git a/crates/uv-static/src/env_vars.rs b/crates/uv-static/src/env_vars.rs
index 2e2511e51..64fa737c0 100644
--- a/crates/uv-static/src/env_vars.rs
+++ b/crates/uv-static/src/env_vars.rs
@@ -2,10 +2,20 @@
 pub struct EnvVars;
 
 impl EnvVars {
+    /// Equivalent to the `--default-index` argument. Base index URL for searching packages.
+    pub const UV_DEFAULT_INDEX: &'static str = "UV_DEFAULT_INDEX";
+
+    /// Equivalent to the `--index` argument. Additional indexes for searching packages.
+    pub const UV_INDEX: &'static str = "UV_INDEX";
+
     /// Equivalent to the `--index-url` argument. Base index URL for searching packages.
+    ///
+    /// Deprecated: use `UV_DEFAULT_INDEX` instead.
     pub const UV_INDEX_URL: &'static str = "UV_INDEX_URL";
 
     /// Equivalent to the `--extra-index-url` argument. Additional indexes for searching packages.
+    ///
+    /// Deprecated: use `UV_INDEX` instead.
     pub const UV_EXTRA_INDEX_URL: &'static str = "UV_EXTRA_INDEX_URL";
 
     /// Equivalent to the `--find-links` argument. Additional package search locations.
@@ -149,6 +159,16 @@ impl EnvVars {
     /// Use to control the stack size used by uv. Typically more relevant for Windows in debug mode.
     pub const UV_STACK_SIZE: &'static str = "UV_STACK_SIZE";
 
+    /// Generates the environment variable key for the HTTP Basic authentication username.
+    pub fn http_basic_username(name: &str) -> String {
+        format!("UV_HTTP_BASIC_{name}_USERNAME")
+    }
+
+    /// Generates the environment variable key for the HTTP Basic authentication password.
+    pub fn http_basic_password(name: &str) -> String {
+        format!("UV_HTTP_BASIC_{name}_PASSWORD")
+    }
+
     /// Used to set the uv commit hash at build time via `build.rs`.
     pub const UV_COMMIT_HASH: &'static str = "UV_COMMIT_HASH";
 
@@ -164,6 +184,12 @@ impl EnvVars {
     /// Used to set the uv tag distance from head at build time via `build.rs`.
     pub const UV_LAST_TAG_DISTANCE: &'static str = "UV_LAST_TAG_DISTANCE";
 
+    /// Used in tests for testing providing credentials via environment variables.
+    pub const UV_HTTP_BASIC_PROXY_USERNAME: &'static str = "UV_HTTP_BASIC_PROXY_USERNAME";
+
+    /// Used in tests for testing providing credentials via environment variables.
+    pub const UV_HTTP_BASIC_PROXY_PASSWORD: &'static str = "UV_HTTP_BASIC_PROXY_PASSWORD";
+
     /// Used to set the spawning/parent interpreter when using --system in the test suite.
     pub const UV_INTERNAL__PARENT_INTERPRETER: &'static str = "UV_INTERNAL__PARENT_INTERPRETER";
 
diff --git a/crates/uv/tests/it/lock.rs b/crates/uv/tests/it/lock.rs
index 059e62781..c47de0151 100644
--- a/crates/uv/tests/it/lock.rs
+++ b/crates/uv/tests/it/lock.rs
@@ -6475,8 +6475,8 @@ fn lock_env_credentials() -> Result<()> {
 
     // Provide credentials via environment variables.
     uv_snapshot!(context.filters(), context.lock()
-        .env("UV_HTTP_BASIC_PROXY_USERNAME", "public")
-        .env("UV_HTTP_BASIC_PROXY_PASSWORD", "heron"), @r###"
+        .env(EnvVars::UV_HTTP_BASIC_PROXY_USERNAME, "public")
+        .env(EnvVars::UV_HTTP_BASIC_PROXY_PASSWORD, "heron"), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
diff --git a/crates/uv/tests/it/pip_install.rs b/crates/uv/tests/it/pip_install.rs
index 454c36a34..7cd2a771c 100644
--- a/crates/uv/tests/it/pip_install.rs
+++ b/crates/uv/tests/it/pip_install.rs
@@ -2327,7 +2327,7 @@ fn no_prerelease_hint_source_builds() -> Result<()> {
         build-backend = "setuptools.build_meta"
     "#})?;
 
-    uv_snapshot!(context.filters(), context.pip_install().arg(".").env("UV_EXCLUDE_NEWER", "2018-10-08"), @r###"
+    uv_snapshot!(context.filters(), context.pip_install().arg(".").env(EnvVars::UV_EXCLUDE_NEWER, "2018-10-08"), @r###"
     success: false
     exit_code: 2
     ----- stdout -----