diff --git a/image-rs/test_data/signature/cosign/cosign.key b/image-rs/test_data/signature/cosign/cosign.key
new file mode 100644
index 000000000..251d904e3
--- /dev/null
+++ b/image-rs/test_data/signature/cosign/cosign.key
@@ -0,0 +1,11 @@
+-----BEGIN ENCRYPTED COSIGN PRIVATE KEY-----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+-----END ENCRYPTED COSIGN PRIVATE KEY-----