diff --git a/tests/data_files/format_gen.key b/tests/data_files/format_gen.key
new file mode 100644
index 0000000..2047232
--- /dev/null
+++ b/tests/data_files/format_gen.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/tests/data_files/format_gen.pub b/tests/data_files/format_gen.pub
new file mode 100644
index 0000000..81a7ab3
--- /dev/null
+++ b/tests/data_files/format_gen.pub
@@ -0,0 +1,6 @@
+-----BEGIN PUBLIC KEY-----
+MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDA0UszjREl+JklUyevaN8fb0Gp
+13Dzb4pY3MCoJK15BWoeoUFAIVvuI0C8bRm/i1OO4BN9tSRrRjW+S89YbYy1C73P
+UgKZSejjnEFA4chcSOKOhZlM6K7+Pcrcx+sdiDu1DheODMiSFhoxt+H6IUvBEGkI
+5AWFu5MDP7wlU/AZfQIDAQAB
+-----END PUBLIC KEY-----
diff --git a/tests/data_files/format_pkcs12.fmt b/tests/data_files/format_pkcs12.fmt
new file mode 100644
index 0000000..296d599
--- /dev/null
+++ b/tests/data_files/format_pkcs12.fmt
Binary files differ
diff --git a/tests/data_files/format_rsa.key b/tests/data_files/format_rsa.key
new file mode 100644
index 0000000..0c8cb57
--- /dev/null
+++ b/tests/data_files/format_rsa.key
@@ -0,0 +1,15 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/tests/data_files/server2.key b/tests/data_files/server2.key
new file mode 100644
index 0000000..70a764a
--- /dev/null
+++ b/tests/data_files/server2.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----