diff --git a/test/assets/d.artifact.tgz b/test/assets/d.artifact.tgz
new file mode 100644
index 0000000..390b823
Binary files /dev/null and b/test/assets/d.artifact.tgz differ
diff --git a/test/assets/d.stmt.json b/test/assets/d.stmt.json
deleted file mode 100644
index 8ca8cb0..0000000
--- a/test/assets/d.stmt.json
+++ /dev/null
@@ -1,47 +0,0 @@
-{
-  "_type": "https://in-toto.io/Statement/v1",
-  "subject": [
-    {
-      "name": "pkg:npm/sigstore@2.1.0",
-      "digest": {
-        "sha512": "90f223f992e4c88dd068cd2a5fc57f9d2b30798343dd6e38f29c240e04ba090ef831f84490847c4e82b9232c78e8a258463b1e55c0f7469f730265008fa6633f"
-      }
-    }
-  ],
-  "predicateType": "https://slsa.dev/provenance/v1",
-  "predicate": {
-    "buildDefinition": {
-      "buildType": "https://slsa-framework.github.io/github-actions-buildtypes/workflow/v1",
-      "externalParameters": {
-        "workflow": {
-          "ref": "refs/heads/main",
-          "repository": "https://github.com/sigstore/sigstore-js",
-          "path": ".github/workflows/release.yml"
-        }
-      },
-      "internalParameters": {
-        "github": {
-          "event_name": "push",
-          "repository_id": "495574555",
-          "repository_owner_id": "71096353"
-        }
-      },
-      "resolvedDependencies": [
-        {
-          "uri": "git+https://github.com/sigstore/sigstore-js@refs/heads/main",
-          "digest": {
-            "gitCommit": "26d16513386ffaa790b1c32f927544f1322e4194"
-          }
-        }
-      ]
-    },
-    "runDetails": {
-      "builder": {
-        "id": "https://github.com/actions/runner/github-hosted"
-      },
-      "metadata": {
-        "invocationId": "https://github.com/sigstore/sigstore-js/actions/runs/6014488666/attempts/1"
-      }
-    }
-  }
-}
diff --git a/test/test_bundle.py b/test/test_bundle.py
index 8a52f6e..ae1f556 100644
--- a/test/test_bundle.py
+++ b/test/test_bundle.py
@@ -24,7 +24,7 @@ def test_verify_dsse_bundle_with_trust_root(client: SigstoreClient, make_materia
     Test the happy path of verification for DSSE bundle w/ custom trust root
     """
     materials: BundleMaterials
-    input_path, materials = make_materials_by_type("d.stmt.json", BundleMaterials)
+    input_path, materials = make_materials_by_type("d.artifact.tgz", BundleMaterials)
     materials.bundle = Path("d.stmt.good.sigstore")
     materials.trusted_root = Path("trusted_root.d.json")
 
@@ -176,7 +176,7 @@ def test_verify_rejects_expired_certificate(client: SigstoreClient, make_materia
     outside the validity window of the trusted root
     """
     materials: BundleMaterials
-    input_path, materials = make_materials_by_type("d.stmt.json", BundleMaterials)
+    input_path, materials = make_materials_by_type("d.artifact.tgz", BundleMaterials)
     materials.bundle = Path("d.stmt.cert-expired.sigstore")
     materials.trusted_root = Path("trusted_root.d.json")
 
@@ -190,7 +190,7 @@ def test_verify_rejects_missing_inclusion_proof(client: SigstoreClient, make_mat
     contain an inclusion proof
     """
     materials: BundleMaterials
-    input_path, materials = make_materials_by_type("d.stmt.json", BundleMaterials)
+    input_path, materials = make_materials_by_type("d.artifact.tgz", BundleMaterials)
     materials.bundle = Path("d.stmt.no-inclusion-proof.sigstore")
     materials.trusted_root = Path("trusted_root.d.json")
 
@@ -205,7 +205,7 @@ def test_verify_rejects_bad_tlog_timestamp(client: SigstoreClient, make_material
     certificate.
     """
     materials: BundleMaterials
-    input_path, materials = make_materials_by_type("d.stmt.json", BundleMaterials)
+    input_path, materials = make_materials_by_type("d.artifact.tgz", BundleMaterials)
     materials.bundle = Path("d.stmt.tlog-timestamp-error.sigstore")
     materials.trusted_root = Path("trusted_root.d.json")
 
@@ -219,7 +219,7 @@ def test_verify_rejects_bad_tlog_entry(client: SigstoreClient, make_materials_by
     not match the signed artifact.
     """
     materials: BundleMaterials
-    input_path, materials = make_materials_by_type("d.stmt.json", BundleMaterials)
+    input_path, materials = make_materials_by_type("d.artifact.tgz", BundleMaterials)
     materials.bundle = Path("d.stmt.tlog-body-error.sigstore")
     materials.trusted_root = Path("trusted_root.d.json")
 
@@ -233,7 +233,7 @@ def test_verify_rejects_bad_tsa_timestamp(client: SigstoreClient, make_materials
     the validity window of the signing certificate.
     """
     materials: BundleMaterials
-    input_path, materials = make_materials_by_type("d.stmt.json", BundleMaterials)
+    input_path, materials = make_materials_by_type("d.artifact.tgz", BundleMaterials)
     materials.bundle = Path("d.stmt.tsa-timestamp-error.sigstore")
     materials.trusted_root = Path("trusted_root.d.json")