diff --git a/crates/uv/tests/it/sync.rs b/crates/uv/tests/it/sync.rs
index ad2453e05..ead9c4063 100644
--- a/crates/uv/tests/it/sync.rs
+++ b/crates/uv/tests/it/sync.rs
@@ -5827,3 +5827,150 @@ fn sync_build_tag() -> Result<()> {
 
     Ok(())
 }
+
+#[test]
+fn url_hash_mismatch() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(
+        r#"
+        [project]
+        name = "project"
+        version = "0.1.0"
+        requires-python = ">=3.12"
+        dependencies = ["iniconfig"]
+
+        [build-system]
+        requires = ["setuptools>=42"]
+        build-backend = "setuptools.build_meta"
+
+        [tool.uv.sources]
+        iniconfig = { url = "https://files.pythonhosted.org/packages/d7/4b/cbd8e699e64a6f16ca3a8220661b5f83792b3017d0f79807cb8708d33913/iniconfig-2.0.0.tar.gz" }
+        "#,
+    )?;
+
+    // Write a lockfile with an invalid hash.
+    context.temp_dir.child("uv.lock").write_str(indoc! {r#"
+        version = 1
+        requires-python = ">=3.12"
+
+        [options]
+        exclude-newer = "2024-03-25T00:00:00Z"
+
+        [[package]]
+        name = "iniconfig"
+        version = "2.0.0"
+        source = { url = "https://files.pythonhosted.org/packages/d7/4b/cbd8e699e64a6f16ca3a8220661b5f83792b3017d0f79807cb8708d33913/iniconfig-2.0.0.tar.gz" }
+        sdist = { hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b4" }
+
+        [[package]]
+        name = "project"
+        version = "0.1.0"
+        source = { editable = "." }
+        dependencies = [
+            { name = "iniconfig" },
+        ]
+
+        [package.metadata]
+        requires-dist = [{ name = "iniconfig", url = "https://files.pythonhosted.org/packages/d7/4b/cbd8e699e64a6f16ca3a8220661b5f83792b3017d0f79807cb8708d33913/iniconfig-2.0.0.tar.gz" }]
+    "#})?;
+
+    // Running `uv sync` should fail.
+    uv_snapshot!(context.filters(), context.sync(), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 2 packages in [TIME]
+      × Failed to download and build `iniconfig @ https://files.pythonhosted.org/packages/d7/4b/cbd8e699e64a6f16ca3a8220661b5f83792b3017d0f79807cb8708d33913/iniconfig-2.0.0.tar.gz`
+      ╰─▶ Hash mismatch for `iniconfig @ https://files.pythonhosted.org/packages/d7/4b/cbd8e699e64a6f16ca3a8220661b5f83792b3017d0f79807cb8708d33913/iniconfig-2.0.0.tar.gz`
+
+          Expected:
+            sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b4
+
+          Computed:
+            sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3
+      help: `iniconfig` was included because `project` (v0.1.0) depends on `iniconfig`
+    "###);
+
+    Ok(())
+}
+
+#[test]
+fn path_hash_mismatch() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Download the source.
+    let archive = context.temp_dir.child("iniconfig-2.0.0.tar.gz");
+    download_to_disk(
+        "https://files.pythonhosted.org/packages/d7/4b/cbd8e699e64a6f16ca3a8220661b5f83792b3017d0f79807cb8708d33913/iniconfig-2.0.0.tar.gz",
+        &archive,
+    );
+
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(
+        r#"
+        [project]
+        name = "project"
+        version = "0.1.0"
+        requires-python = ">=3.12"
+        dependencies = ["iniconfig"]
+
+        [build-system]
+        requires = ["setuptools>=42"]
+        build-backend = "setuptools.build_meta"
+
+        [tool.uv.sources]
+        iniconfig = { path = "iniconfig-2.0.0.tar.gz" }
+        "#,
+    )?;
+
+    // Write a lockfile with an invalid hash.
+    context.temp_dir.child("uv.lock").write_str(indoc! {r#"
+        version = 1
+        requires-python = ">=3.12"
+
+        [options]
+        exclude-newer = "2024-03-25T00:00:00Z"
+
+        [[package]]
+        name = "iniconfig"
+        version = "2.0.0"
+        source = { path = "iniconfig-2.0.0.tar.gz" }
+        sdist = { hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b4" }
+
+        [[package]]
+        name = "project"
+        version = "0.1.0"
+        source = { editable = "." }
+        dependencies = [
+            { name = "iniconfig" },
+        ]
+
+        [package.metadata]
+        requires-dist = [{ name = "iniconfig", path = "iniconfig-2.0.0.tar.gz" }]
+    "#})?;
+
+    // Running `uv sync` should fail.
+    uv_snapshot!(context.filters(), context.sync(), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 2 packages in [TIME]
+      × Failed to build `iniconfig @ file://[TEMP_DIR]/iniconfig-2.0.0.tar.gz`
+      ╰─▶ Hash mismatch for `iniconfig @ file://[TEMP_DIR]/iniconfig-2.0.0.tar.gz`
+
+          Expected:
+            sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b4
+
+          Computed:
+            sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3
+      help: `iniconfig` was included because `project` (v0.1.0) depends on `iniconfig`
+    "###);
+
+    Ok(())
+}