diff --git a/crates/uv-settings/src/lib.rs b/crates/uv-settings/src/lib.rs
index 64f160aa3..ed226b549 100644
--- a/crates/uv-settings/src/lib.rs
+++ b/crates/uv-settings/src/lib.rs
@@ -211,8 +211,8 @@ fn validate_uv_toml(path: &Path, options: &Options) -> Result<(), Error> {
         override_dependencies: _,
         constraint_dependencies: _,
         build_constraint_dependencies: _,
-        environments: _,
-        required_environments: _,
+        environments,
+        required_environments,
         conflicts,
         workspace,
         sources,
@@ -265,6 +265,19 @@ fn validate_uv_toml(path: &Path, options: &Options) -> Result<(), Error> {
             "build-backend",
         ));
     }
+    if environments.is_some() {
+        return Err(Error::PyprojectOnlyField(
+            path.to_path_buf(),
+            "environments",
+        ));
+    }
+
+    if required_environments.is_some() {
+        return Err(Error::PyprojectOnlyField(
+            path.to_path_buf(),
+            "required-environments",
+        ));
+    }
     Ok(())
 }
 
@@ -336,8 +349,8 @@ fn warn_uv_toml_masked_fields(options: &Options) {
         override_dependencies,
         constraint_dependencies,
         build_constraint_dependencies,
-        environments,
-        required_environments,
+        environments: _,
+        required_environments: _,
         conflicts: _,
         workspace: _,
         sources: _,
@@ -504,12 +517,6 @@ fn warn_uv_toml_masked_fields(options: &Options) {
     if build_constraint_dependencies.is_some() {
         masked_fields.push("build-constraint-dependencies");
     }
-    if environments.is_some() {
-        masked_fields.push("environments");
-    }
-    if required_environments.is_some() {
-        masked_fields.push("required-environments");
-    }
     if !masked_fields.is_empty() {
         let field_listing = masked_fields.join("\n- ");
         warn_user!(
diff --git a/crates/uv/tests/it/pip_compile.rs b/crates/uv/tests/it/pip_compile.rs
index 8874949c2..34af0ed08 100644
--- a/crates/uv/tests/it/pip_compile.rs
+++ b/crates/uv/tests/it/pip_compile.rs
@@ -14266,8 +14266,6 @@ matplotlib
 fn importlib_metadata_not_repeated() -> Result<()> {
     let context = TestContext::new("3.12");
 
-    let uv_toml = context.temp_dir.child("uv.toml");
-    uv_toml.write_str(r#"environments = ["python_version >= '3.10'", "python_version >= '3.8' and python_version < '3.10'", "python_version < '3.8'"]"#)?;
     let requirements_in = context.temp_dir.child("requirements.in");
     requirements_in.write_str("build")?;