diff --git a/test/tpkcs7d b/test/tpkcs7d
new file mode 100644
index 0000000..c8f18fb
--- /dev/null
+++ b/test/tpkcs7d
@@ -0,0 +1,44 @@
+#!/bin/sh
+
+PATH=../apps:$PATH
+export PATH
+
+cmd='../apps/ssleay pkcs7'
+
+if [ "$1"x != "x" ]; then
+	t=$1
+else
+	t=pkcs7-1.pem
+fi
+
+echo testing pkcs7 conversions
+cp $t fff.p
+
+echo "p -> d"
+$cmd -in fff.p -inform p -outform d >f.d
+if [ $? != 0 ]; then exit 1; fi
+echo "p -> p"
+$cmd -in fff.p -inform p -outform p >f.p
+if [ $? != 0 ]; then exit 1; fi
+
+echo "d -> d"
+$cmd -in f.d -inform d -outform d >ff.d1
+if [ $? != 0 ]; then exit 1; fi
+echo "p -> d"
+$cmd -in f.p -inform p -outform d >ff.d3
+if [ $? != 0 ]; then exit 1; fi
+
+echo "d -> p"
+$cmd -in f.d -inform d -outform p >ff.p1
+if [ $? != 0 ]; then exit 1; fi
+echo "p -> p"
+$cmd -in f.p -inform p -outform p >ff.p3
+if [ $? != 0 ]; then exit 1; fi
+
+cmp f.p ff.p1
+if [ $? != 0 ]; then exit 1; fi
+cmp f.p ff.p3
+if [ $? != 0 ]; then exit 1; fi
+
+/bin/rm -f f.* ff.* fff.*
+exit 0