diff --git a/crates/uv-toolchain/src/discovery.rs b/crates/uv-toolchain/src/discovery.rs
index 0d892db39174..0a1f311dabdd 100644
--- a/crates/uv-toolchain/src/discovery.rs
+++ b/crates/uv-toolchain/src/discovery.rs
@@ -1504,7 +1504,7 @@ mod tests {
             ToolchainRequest::Version(VersionRequest::from_str(">=3.12").unwrap())
         );
         assert_eq!(
-            ToolchainRequest::parse(">=3.12"),
+            ToolchainRequest::parse(">=3.12,<3.13"),
             ToolchainRequest::Version(VersionRequest::from_str(">=3.12,<3.13").unwrap())
         );
         assert_eq!(
diff --git a/crates/uv/tests/common/mod.rs b/crates/uv/tests/common/mod.rs
index 8c2fad5775c3..a5944523e5ef 100644
--- a/crates/uv/tests/common/mod.rs
+++ b/crates/uv/tests/common/mod.rs
@@ -234,6 +234,7 @@ impl TestContext {
             .arg("--cache-dir")
             .arg(self.cache_dir.path())
             .env("VIRTUAL_ENV", self.venv.as_os_str())
+            .env("UV_TEST_PYTHON_PATH", "/dev/null")
             .env("UV_NO_WRAP", "1")
             .env("UV_TEST_PYTHON_PATH", "/dev/null")
             .current_dir(&self.temp_dir);
@@ -250,7 +251,10 @@ impl TestContext {
     /// Create a `uv lock` command with options shared across scenarios.
     pub fn lock(&self) -> std::process::Command {
         let mut command = self.lock_without_exclude_newer();
-        command.arg("--exclude-newer").arg(EXCLUDE_NEWER);
+        command
+            .arg("--exclude-newer")
+            .arg(EXCLUDE_NEWER)
+            .env("UV_TEST_PYTHON_PATH", "/dev/null");
         command
     }
 
diff --git a/crates/uv/tests/lock.rs b/crates/uv/tests/lock.rs
index 16c9a6dd8f86..6200b1923807 100644
--- a/crates/uv/tests/lock.rs
+++ b/crates/uv/tests/lock.rs
@@ -2065,29 +2065,27 @@ fn lock_requires_python() -> Result<()> {
     });
 
     // Validate that attempting to install with an unsupported Python version raises an error.
-    let context = TestContext::new("3.8");
+    let context38 = TestContext::new("3.8");
 
-    fs_err::copy(pyproject_toml, context.temp_dir.join("pyproject.toml"))?;
-    fs_err::copy(&lockfile, context.temp_dir.join("uv.lock"))?;
+    fs_err::copy(pyproject_toml, context38.temp_dir.join("pyproject.toml"))?;
+    fs_err::copy(&lockfile, context38.temp_dir.join("uv.lock"))?;
+
+    let filters: Vec<_> = context38
+        .filters()
+        .into_iter()
+        .chain(context.filters())
+        .collect();
 
     // Install from the lockfile.
-    uv_snapshot!(context.filters(), context.sync(), @r###"
-    success: true
-    exit_code: 0
+    uv_snapshot!(filters, context38.sync(), @r###"
+    success: false
+    exit_code: 2
     ----- stdout -----
 
     ----- stderr -----
     warning: `uv sync` is experimental and may change without warning.
     Removing virtual environment at: [VENV]/
-    Using Python 3.12.3 interpreter at: /opt/homebrew/opt/python@3.12/bin/python3.12
-    Creating virtualenv at: [VENV]/
-    Downloaded 5 packages in [TIME]
-    Installed 5 packages in [TIME]
-     + attrs==23.2.0
-     + cattrs==23.2.3
-     + lsprotocol==2023.0.1
-     + project==0.1.0 (from file://private/var/folders/6p/k5sd5z7j31b31pq4lhn0l8d80000gn/T/.tmp2LoTc2)
-     + pygls==1.3.0
+    error: No interpreter found for Python >=3.12 in provided path, active virtual environment, or search path
     "###);
 
     Ok(())