diff --git a/src/lib-dcrypt/test-stream.c b/src/lib-dcrypt/test-stream.c
index 00dfe0610d..b47b087bff 100644
--- a/src/lib-dcrypt/test-stream.c
+++ b/src/lib-dcrypt/test-stream.c
@@ -194,6 +194,7 @@ void test_write_read_v1(void)
 	test_assert(o_stream_nfinish(os_2) == 0);
 	test_assert(os_2->stream_errno == 0);
 
+	o_stream_unref(&os);
 	o_stream_unref(&os_2);
 
 	struct istream *is = iostream_temp_finish(&os, IO_BLOCK_SIZE);
@@ -234,6 +235,7 @@ void test_write_read_v1_short(void)
 	test_assert(o_stream_nfinish(os_2) == 0);
 	test_assert(os_2->stream_errno == 0);
 
+	o_stream_unref(&os);
 	o_stream_unref(&os_2);
 
 	struct istream *is = iostream_temp_finish(&os, IO_BLOCK_SIZE);
@@ -266,6 +268,7 @@ void test_write_read_v1_empty(void)
 	if (os_2->stream_errno != 0)
 		i_debug("error: %s", o_stream_get_error(os_2));
 
+	o_stream_unref(&os);
 	o_stream_unref(&os_2);
 	/* this should've been enough */
 
@@ -301,6 +304,7 @@ void test_write_read_v2(void)
 	if (os_2->stream_errno != 0)
 		i_debug("error: %s", o_stream_get_error(os_2));
 
+	o_stream_unref(&os);
 	o_stream_unref(&os_2);
 
 	struct istream *is = iostream_temp_finish(&os, IO_BLOCK_SIZE);
@@ -339,6 +343,7 @@ void test_write_read_v2_short(void)
 	if (os_2->stream_errno != 0)
 		i_debug("error: %s", o_stream_get_error(os_2));
 
+	o_stream_unref(&os);
 	o_stream_unref(&os_2);
 
 	struct istream *is = iostream_temp_finish(&os, IO_BLOCK_SIZE);
@@ -373,6 +378,7 @@ void test_write_read_v2_empty(void)
 	if (os_2->stream_errno != 0)
 		i_debug("error: %s", o_stream_get_error(os_2));
 
+	o_stream_unref(&os);
 	o_stream_unref(&os_2);
 	/* this should've been enough */