diff --git a/src/lib-sieve/plugins/mailbox/Makefile.am b/src/lib-sieve/plugins/mailbox/Makefile.am
index cb5ec82191e799db1e274ebaed6eb2ed7fdc4eae..0f4813c85ec4fb96235c183bc5f56610811f0f50 100644
--- a/src/lib-sieve/plugins/mailbox/Makefile.am
+++ b/src/lib-sieve/plugins/mailbox/Makefile.am
@@ -10,12 +10,12 @@ AM_CPPFLAGS = \
 tags = \
 	tag-mailbox-create.c
 
-commands = \
-	cmd-mailboxexists.c
+tests = \
+	tst-mailboxexists.c
 
 libsieve_ext_mailbox_la_SOURCES = \
 	$(tags) \
-	$(commands) \
+	$(tests) \
 	ext-mailbox.c
 
 noinst_HEADERS = \
diff --git a/src/lib-sieve/plugins/mailbox/cmd-mailboxexists.c b/src/lib-sieve/plugins/mailbox/tst-mailboxexists.c
similarity index 100%
rename from src/lib-sieve/plugins/mailbox/cmd-mailboxexists.c
rename to src/lib-sieve/plugins/mailbox/tst-mailboxexists.c