diff --git a/selftest-requirements.txt b/selftest-requirements.txt
index 2df50d7..89de157 100644
--- a/selftest-requirements.txt
+++ b/selftest-requirements.txt
@@ -1,2 +1,2 @@
 # Use a commit from main until sigstore-python release > 4.1.0
-sigstore @ git+https://github.com/sigstore/sigstore-python.git@379054cfc27212e4cf0177451984ce968cbb8b7e
\ No newline at end of file
+sigstore @ git+https://github.com/sigstore/sigstore-python.git@b1ef51c78b34dbd772ec2a2d8d07ad6a6b4d853d
diff --git a/test/assets/bundle-verify/bundle-with-sct-with-extensions/README b/test/assets/bundle-verify/bundle-with-sct-with-extensions/README
new file mode 100644
index 0000000..14cd4ed
--- /dev/null
+++ b/test/assets/bundle-verify/bundle-with-sct-with-extensions/README
@@ -0,0 +1 @@
+Bundle with an SCT with a non-empty extension field (used for Static CT) should succeed.
diff --git a/test/assets/bundle-verify/bundle-with-sct-with-extensions/bundle.sigstore.json b/test/assets/bundle-verify/bundle-with-sct-with-extensions/bundle.sigstore.json
new file mode 100644
index 0000000..028506c
--- /dev/null
+++ b/test/assets/bundle-verify/bundle-with-sct-with-extensions/bundle.sigstore.json
@@ -0,0 +1 @@
+{"mediaType":"application/vnd.dev.sigstore.bundle.v0.3+json", 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\ No newline at end of file
diff --git a/test/assets/bundle-verify/bundle-with-sct-with-extensions/trusted_root.json b/test/assets/bundle-verify/bundle-with-sct-with-extensions/trusted_root.json
new file mode 100644
index 0000000..c6ee8b2
--- /dev/null
+++ b/test/assets/bundle-verify/bundle-with-sct-with-extensions/trusted_root.json
@@ -0,0 +1 @@
+{"mediaType":"application/vnd.dev.sigstore.trustedroot+json;version=0.1","tlogs":[{"baseUrl":"http://rekor-local","hashAlgorithm":"SHA2_256","publicKey":{"rawBytes":"MCowBQYDK2VwAyEAREvJyNZGjX6B3DAIuD3BTg9rIwV00GY8Xg5FU+IFDUQ=","keyDetails":"PKIX_ED25519","validFor":{"start":"2026-01-15T22:45:54Z"}},"logId":{"keyId":"2AtEIMfG6Y41yK0tcwRTBS2tjhOrjKGIpDkHFgp65g0="}}],"certificateAuthorities":[{"subject":{"organization":"Sigstore","commonName":"fulcio.test"},"uri":"http://localhost:5555","certChain":{"certificates":[{"rawBytes":"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"}]},"validFor":{"start":"2026-01-15T22:45:54Z"}}],"ctlogs":[{"baseUrl":"http://tesseract","hashAlgorithm":"SHA2_256","publicKey":{"rawBytes":"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEiFqVZDih9Jff02pEQcyhGFH+Vm8YnKoWOMoTdgeEej8SgDE4kXnGCe0LK4kvXvrbgiMuN0Ih6a45aVnEaQOjSQ==","keyDetails":"PKIX_ECDSA_P256_SHA_256","validFor":{"start":"2026-01-15T22:45:54Z"}},"logId":{"keyId":"LKXNJ6iUhMOOdIaNLTveHnhSr+fidx5vice9Zn38+O8="}}],"timestampAuthorities":[{"subject":{"organization":"sigstore.dev","commonName":"sigstore-tsa-selfsigned"},"uri":"https://timestamp.sigstore.dev/api/v1/timestamp","certChain":{"certificates":[{"rawBytes":"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"},{"rawBytes":"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"}]},"validFor":{"start":"2025-07-04T00:00:00Z"}}]}