diff --git a/tests/fixtures/invalid/artifact-attestation/missing-required-field.json b/tests/fixtures/invalid/artifact-attestation/missing-required-field.json
new file mode 100644
index 0000000..149e014
--- /dev/null
+++ b/tests/fixtures/invalid/artifact-attestation/missing-required-field.json
@@ -0,0 +1,3 @@
+{
+  "artifact_uri": "pkg:npm/example@1.0.0"
+}
diff --git a/tests/fixtures/valid/artifact-attestation/basic.json b/tests/fixtures/valid/artifact-attestation/basic.json
new file mode 100644
index 0000000..a318b3e
--- /dev/null
+++ b/tests/fixtures/valid/artifact-attestation/basic.json
@@ -0,0 +1,7 @@
+{
+  "artifact_uri": "pkg:npm/example@1.0.0",
+  "digest": "sha256:abc123",
+  "produced_by_run_id": "run-123",
+  "tool_name": "builder",
+  "signature": "sig123"
+}