diff --git a/.gitignore b/.gitignore
index 23139844..925e6a20 100644
--- a/.gitignore
+++ b/.gitignore
@@ -65,6 +65,7 @@ test/default/box7
 test/default/box8
 test/default/box_easy
 test/default/box_easy2
+test/default/box_seed
 test/default/chacha20
 test/default/core1
 test/default/core2
diff --git a/test/default/Makefile.am b/test/default/Makefile.am
index f4a4aab1..0b09a26d 100644
--- a/test/default/Makefile.am
+++ b/test/default/Makefile.am
@@ -14,6 +14,7 @@ EXTRA_DIST = \
 	box8.exp \
 	box_easy.exp \
 	box_easy2.exp \
+	box_seed.exp \
 	chacha20.exp \
 	core1.exp \
 	core2.exp \
@@ -69,6 +70,7 @@ DISTCLEANFILES = \
 	box8.res \
 	box_easy.res \
 	box_easy2.res \
+	box_seed.res \
 	chacha20.res \
 	core1.res \
 	core2.res \
@@ -132,6 +134,7 @@ TESTS_TARGETS = \
 	box8 \
 	box_easy \
 	box_easy2 \
+	box_seed \
 	chacha20 \
 	core1 \
 	core2 \
@@ -217,6 +220,9 @@ box_easy_LDADD            = $(TESTS_LDADD)
 box_easy2_SOURCE          = cmptest.h box_easy2.c
 box_easy2_LDADD           = $(TESTS_LDADD)
 
+box_seed_SOURCE           = cmptest.h box_seed.c
+box_seed_LDADD            = $(TESTS_LDADD)
+
 chacha20_SOURCE           = cmptest.h chacha20.c
 chacha20_LDADD            = $(TESTS_LDADD)
 
diff --git a/test/default/box_seed.c b/test/default/box_seed.c
new file mode 100644
index 00000000..6533d8cb
--- /dev/null
+++ b/test/default/box_seed.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+
+#define TEST_NAME "box_seed"
+#include "cmptest.h"
+
+unsigned char seed[32] = {
+ 0x77,0x07,0x6d,0x0a,0x73,0x18,0xa5,0x7d
+,0x3c,0x16,0xc1,0x72,0x51,0xb2,0x66,0x45
+,0xdf,0x4c,0x2f,0x87,0xeb,0xc0,0x99,0x2a
+,0xb1,0x77,0xfb,0xa5,0x1d,0xb9,0x2c,0x2a
+};
+
+int main(void)
+{
+  int i;
+  unsigned char sk[32];
+  unsigned char pk[32];
+  crypto_box_curve25519xsalsa20poly1305_seed_keypair(pk, sk, seed);
+  for (i = 0;i < 32;++i) {
+    printf(",0x%02x",(unsigned int) pk[i]);
+    if (i % 8 == 7) printf("\n");
+  }
+  for (i = 0;i < 32;++i) {
+    printf(",0x%02x",(unsigned int) sk[i]);
+    if (i % 8 == 7) printf("\n");
+  }
+  return 0;
+}
diff --git a/test/default/box_seed.exp b/test/default/box_seed.exp
new file mode 100644
index 00000000..8a3803e4
--- /dev/null
+++ b/test/default/box_seed.exp
@@ -0,0 +1,8 @@
+,0x85,0x20,0xf0,0x09,0x89,0x30,0xa7,0x54
+,0x74,0x8b,0x7d,0xdc,0xb4,0x3e,0xf7,0x5a
+,0x0d,0xbf,0x3a,0x0d,0x26,0x38,0x1a,0xf4
+,0xeb,0xa4,0xa9,0x8e,0xaa,0x9b,0x4e,0x6a
+,0x77,0x07,0x6d,0x0a,0x73,0x18,0xa5,0x7d
+,0x3c,0x16,0xc1,0x72,0x51,0xb2,0x66,0x45
+,0xdf,0x4c,0x2f,0x87,0xeb,0xc0,0x99,0x2a
+,0xb1,0x77,0xfb,0xa5,0x1d,0xb9,0x2c,0x2a