diff --git a/tests/data/Makefile.am b/tests/data/Makefile.am
index 79ed6daf82..e20b0b6d5f 100644
--- a/tests/data/Makefile.am
+++ b/tests/data/Makefile.am
@@ -65,7 +65,7 @@ test709 test710 test711 test712 \
 \
 test800 test801 test802 test803 test804 test805 test806 test807 test808 \
 test809 test810 test811 test812 test813 test814 test815 test816 test817 \
-test818 test819 test820 test821 test822 test823 test824 \
+test818 test819 test820 test821 test822 test823 test824 test825 \
 \
 test850 test851 test852 test853 test854 test855 test856 test857 test858 \
 test859 test860 test861 test862 test863 test864 test865 test866 test867 \
diff --git a/tests/data/test825 b/tests/data/test825
new file mode 100644
index 0000000000..63a5c40ecf
--- /dev/null
+++ b/tests/data/test825
@@ -0,0 +1,54 @@
+<testcase>
+<info>
+<keywords>
+IMAP
+IMAP AUTH PLAIN SASL-IR
+RFC4616
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+AUTH PLAIN
+CAPA SASL-IR
+REPLY AUTHENTICATE + dXNlcgB1c2VyAHNlY3JldA== A002 OK AUTHENTICATE completed
+</servercmd>
+<data>
+From: me@somewhere
+To: fake@nowhere
+
+body
+
+--
+  yours sincerely
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+imap
+</server>
+ <name>
+IMAP plain authentication with initial response
+ </name>
+ <command>
+'imap://%HOSTIP:%IMAPPORT/825/;UID=1' -u user:secret
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+A001 CAPABILITY
+A002 AUTHENTICATE PLAIN dXNlcgB1c2VyAHNlY3JldA==
+A003 SELECT 825
+A004 FETCH 1 BODY[]
+A005 LOGOUT
+</protocol>
+</verify>
+</testcase>