diff --git a/tests/fixtures/bc:0bc3024ce6404cd7aea387debde687d9e8731228e16b04b4eefda7283069f1c3.yaml b/tests/fixtures/bc_0bc3024ce6404cd7aea387debde687d9e8731228e16b04b4eefda7283069f1c3.yaml
similarity index 100%
rename from tests/fixtures/bc:0bc3024ce6404cd7aea387debde687d9e8731228e16b04b4eefda7283069f1c3.yaml
rename to tests/fixtures/bc_0bc3024ce6404cd7aea387debde687d9e8731228e16b04b4eefda7283069f1c3.yaml
diff --git a/tests/fixtures/bc:3652d9fea802cb051f671455cbd7472e3bce2c440a4e54fa4321107037dfaff0.yaml b/tests/fixtures/bc_3652d9fea802cb051f671455cbd7472e3bce2c440a4e54fa4321107037dfaff0.yaml
similarity index 100%
rename from tests/fixtures/bc:3652d9fea802cb051f671455cbd7472e3bce2c440a4e54fa4321107037dfaff0.yaml
rename to tests/fixtures/bc_3652d9fea802cb051f671455cbd7472e3bce2c440a4e54fa4321107037dfaff0.yaml
diff --git a/tests/fixtures/bc:a5c3085efe8dfdba0fa0e11d81bf90cdcac27c0af496c4de1a2fd9659948ffce.yaml b/tests/fixtures/bc_a5c3085efe8dfdba0fa0e11d81bf90cdcac27c0af496c4de1a2fd9659948ffce.yaml
similarity index 100%
rename from tests/fixtures/bc:a5c3085efe8dfdba0fa0e11d81bf90cdcac27c0af496c4de1a2fd9659948ffce.yaml
rename to tests/fixtures/bc_a5c3085efe8dfdba0fa0e11d81bf90cdcac27c0af496c4de1a2fd9659948ffce.yaml
diff --git a/tests/fixtures/bc:c269055b7750a234087c11acd7a408172cb84d8fc6af0ded42d8a8cbea6712e9.yaml b/tests/fixtures/bc_c269055b7750a234087c11acd7a408172cb84d8fc6af0ded42d8a8cbea6712e9.yaml
similarity index 100%
rename from tests/fixtures/bc:c269055b7750a234087c11acd7a408172cb84d8fc6af0ded42d8a8cbea6712e9.yaml
rename to tests/fixtures/bc_c269055b7750a234087c11acd7a408172cb84d8fc6af0ded42d8a8cbea6712e9.yaml
diff --git a/tests/fixtures/bc:d077ea7e3a55a215893a18e82cb03fda0f50619893e4aee0ba70b014e6d63248.yaml b/tests/fixtures/bc_d077ea7e3a55a215893a18e82cb03fda0f50619893e4aee0ba70b014e6d63248.yaml
similarity index 100%
rename from tests/fixtures/bc:d077ea7e3a55a215893a18e82cb03fda0f50619893e4aee0ba70b014e6d63248.yaml
rename to tests/fixtures/bc_d077ea7e3a55a215893a18e82cb03fda0f50619893e4aee0ba70b014e6d63248.yaml
diff --git a/tests/fixtures/bc:d84c37b6c6616184c454c815d970505bed9b3a3723a4445dd1289dc708bc80b3.yaml b/tests/fixtures/bc_d84c37b6c6616184c454c815d970505bed9b3a3723a4445dd1289dc708bc80b3.yaml
similarity index 100%
rename from tests/fixtures/bc:d84c37b6c6616184c454c815d970505bed9b3a3723a4445dd1289dc708bc80b3.yaml
rename to tests/fixtures/bc_d84c37b6c6616184c454c815d970505bed9b3a3723a4445dd1289dc708bc80b3.yaml
diff --git a/tests/validation.rs b/tests/validation.rs
index 12128ba..0945e0c 100644
--- a/tests/validation.rs
+++ b/tests/validation.rs
@@ -208,7 +208,8 @@ fn get_consignment_from_yaml(fname: &str) -> Transfer {
 }
 
 fn get_tx(witness_id: &str) -> (Tx, XWitnessId) {
-    let yaml_path = format!("tests/fixtures/{witness_id}.yaml");
+    let normalized_witness_id = witness_id.replace(":", "_");
+    let yaml_path = format!("tests/fixtures/{normalized_witness_id}.yaml");
     let file = std::fs::File::open(yaml_path).unwrap();
     let tx: Tx = serde_yaml::from_reader(file).unwrap();
     let xwitness_id = XWitnessId::from_str(witness_id).unwrap();