diff --git a/crates/ty/docs/environment.md b/crates/ty/docs/environment.md
index 29c15b6bd0..0baf1f0ed1 100644
--- a/crates/ty/docs/environment.md
+++ b/crates/ty/docs/environment.md
@@ -2,6 +2,15 @@
 
 ty defines and respects the following environment variables:
 
+### `TY_CONFIG_FILE`
+
+Path to a `ty.toml` configuration file to use.
+
+When set, ty will use this file for configuration instead of
+discovering configuration files automatically.
+
+Equivalent to the `--config-file` command-line argument.
+
 ### `TY_LOG`
 
 If set, ty will use this value as the log level for its `--verbose` output.
diff --git a/crates/ty/src/args.rs b/crates/ty/src/args.rs
index ac334f37bf..37ae9b0bae 100644
--- a/crates/ty/src/args.rs
+++ b/crates/ty/src/args.rs
@@ -9,6 +9,7 @@ use ty_combine::Combine;
 use ty_project::metadata::options::{EnvironmentOptions, Options, SrcOptions, TerminalOptions};
 use ty_project::metadata::value::{RangedValue, RelativeGlobPattern, RelativePathBuf, ValueSource};
 use ty_python_semantic::lint;
+use ty_static::EnvVars;
 
 // Configures Clap v3-style help menu colors
 const STYLES: Styles = Styles::styled()
@@ -121,7 +122,7 @@ pub(crate) struct CheckCommand {
     /// The path to a `ty.toml` file to use for configuration.
     ///
     /// While ty configuration can be included in a `pyproject.toml` file, it is not allowed in this context.
-    #[arg(long, env = "TY_CONFIG_FILE", value_name = "PATH")]
+    #[arg(long, env = EnvVars::TY_CONFIG_FILE, value_name = "PATH")]
     pub(crate) config_file: Option<SystemPathBuf>,
 
     /// The format to use for printing diagnostic messages.
diff --git a/crates/ty_static/src/env_vars.rs b/crates/ty_static/src/env_vars.rs
index b15edffd7e..a31b544d23 100644
--- a/crates/ty_static/src/env_vars.rs
+++ b/crates/ty_static/src/env_vars.rs
@@ -39,6 +39,14 @@ impl EnvVars {
     /// when necessary, e.g. to watch for file system changes or a dedicated UI thread.
     pub const TY_MAX_PARALLELISM: &'static str = "TY_MAX_PARALLELISM";
 
+    /// Path to a `ty.toml` configuration file to use.
+    ///
+    /// When set, ty will use this file for configuration instead of
+    /// discovering configuration files automatically.
+    ///
+    /// Equivalent to the `--config-file` command-line argument.
+    pub const TY_CONFIG_FILE: &'static str = "TY_CONFIG_FILE";
+
     /// Used to detect an activated virtual environment.
     pub const VIRTUAL_ENV: &'static str = "VIRTUAL_ENV";