Revert "Remove unused test data files"

This reverts commit ef24980e667debd0cb8f1f26218c452bacbbe084.
diff --git a/tests/data_files/server1.v1.crt b/tests/data_files/server1.v1.crt
new file mode 100644
index 0000000..e85ed30
--- /dev/null
+++ b/tests/data_files/server1.v1.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----