diff --git a/tests/data/m_inmail.utf8.expected1 b/tests/data/m_inmail.utf8.expected1
index 91449ab..e350094 100644
--- a/tests/data/m_inmail.utf8.expected1
+++ b/tests/data/m_inmail.utf8.expected1
@@ -4,3 +4,4 @@ foo3@example.com	First3 Family3	NO DATE
 foo4@example.com	First4 Family4	NO DATE
 foo5@example.com	"First5 Family5"	NO DATE
 foo6@example.com	"First6 Family6"	NO DATE
+foo9@example.com	First9 Günther	NO DATE
diff --git a/tests/data/testmail1 b/tests/data/testmail1
index 9dc3a51..fdd5850 100644
--- a/tests/data/testmail1
+++ b/tests/data/testmail1
@@ -9,6 +9,7 @@ Resent-To: foo5@example.com ("First5 Family5")
 X-Header1: <foo6@example.com> ("First6 Family6")
 X-Header2: <foo7@example.com>
 X-Header3: foo8@example.com
+X-Header4: foo9@example.com (First9 =?UTF-8?Q?G=C3=BCnther?=)
 Subject: lorem ipsum
 Message-ID: <1234567890@example.com>
 References: <0987654321@example.net>
diff --git a/tests/m_inmail.at b/tests/m_inmail.at
index 5b2afc9..e2dac04 100644
--- a/tests/m_inmail.at
+++ b/tests/m_inmail.at
@@ -21,7 +21,7 @@ AT_CHECK([cat $abs_srcdir/data/m_inmail.utf8.expected1 > expout])
 AT_CHECK([cat $abs_srcdir/data/testmail1 > testmail1])
 AT_CHECK([lbdb-fetchaddr -f m_inmail.utf8 -d "NO DATE" < testmail1 && \
  	  lbdb-fetchaddr -f m_inmail.utf8 -d "NO DATE" \
-			 -x x-header1:x-header2:x-header3 < testmail1 && \
+			 -x x-header1:x-header2:x-header3:x-header4 < testmail1 && \
 	  cat m_inmail.utf8], [], [expout])
 AT_CLEANUP
 
diff --git a/tests/testsuite b/tests/testsuite
index b12e292..faa2326 100755
--- a/tests/testsuite
+++ b/tests/testsuite
@@ -2128,12 +2128,12 @@ $at_traceon; }
 { set +x
 $as_echo "$at_srcdir/m_inmail.at:22: lbdb-fetchaddr -f m_inmail.utf8 -d \"NO DATE\" < testmail1 && \\
  	  lbdb-fetchaddr -f m_inmail.utf8 -d \"NO DATE\" \\
-			 -x x-header1:x-header2:x-header3 < testmail1 && \\
+			 -x x-header1:x-header2:x-header3:x-header4 < testmail1 && \\
 	  cat m_inmail.utf8"
 at_fn_check_prepare_notrace 'an embedded newline' "m_inmail.at:22"
 ( $at_check_trace; lbdb-fetchaddr -f m_inmail.utf8 -d "NO DATE" < testmail1 && \
  	  lbdb-fetchaddr -f m_inmail.utf8 -d "NO DATE" \
-			 -x x-header1:x-header2:x-header3 < testmail1 && \
+			 -x x-header1:x-header2:x-header3:x-header4 < testmail1 && \
 	  cat m_inmail.utf8
 ) >>"$at_stdout" 2>>"$at_stderr" 5>&-
 at_status=$? at_failed=false