diff --git a/tests/suites/test_suite_debug.data b/tests/suites/test_suite_debug.data
index 1f0bbd4..31adc0e 100644
--- a/tests/suites/test_suite_debug.data
+++ b/tests/suites/test_suite_debug.data
@@ -1,4 +1,27 @@
 Debug print certificate #1
 depends_on:POLARSSL_DEBUG_C:POLARSSL_PEM_C
-debug_print_crt:"data_files/server1.crt":"MyFile":999:"PREFIX_":"MyFile(0999)\: PREFIX_ #1\:\nMyFile(0999)\: cert. version \: 3\nMyFile(0999)\: serial number \: 01\nMyFile(0999)\: issuer name   \: C=NL, O=PolarSSL, CN=PolarSSL Test CA\nMyFile(0999)\: subject name  \: C=NL, O=PolarSSL, CN=PolarSSL Server 1\nMyFile(0999)\: issued  on    \: 2011-02-12 14\:44\:06\nMyFile(0999)\: expires on    \: 2021-02-12 14\:44\:06\nMyFile(0999)\: signed using  \: RSA+SHA1\nMyFile(0999)\: RSA key size  \: 2048 bits\nMyFile(0999)\: value of 'crt->rsa.N' (2048 bits) is\:\nMyFile(0999)\:  a9 02 1f 3d 40 6a d5 55 53 8b fd 36 ee 82 65 2e\nMyFile(0999)\:  15 61 5e 89 bf b8 e8 45 90 db ee 88 16 52 d3 f1\nMyFile(0999)\:  43 50 47 96 12 59 64 87 6b fd 2b e0 46 f9 73 be\nMyFile(0999)\:  dd cf 92 e1 91 5b ed 66 a0 6f 89 29 79 45 80 d0\nMyFile(0999)\:  83 6a d5 41 43 77 5f 39 7c 09 04 47 82 b0 57 39\nMyFile(0999)\:  70 ed a3 ec 15 19 1e a8 33 08 47 c1 05 42 a9 fd\nMyFile(0999)\:  4c c3 b4 df dd 06 1f 4d 10 51 40 67 73 13 0f 40\nMyFile(0999)\:  f8 6d 81 25 5f 0a b1 53 c6 30 7e 15 39 ac f9 5a\nMyFile(0999)\:  ee 7f 92 9e a6 05 5b e7 13 97 85 b5 23 92 d9 d4\nMyFile(0999)\:  24 06 d5 09 25 89 75 07 dd a6 1a 8f 3f 09 19 be\nMyFile(0999)\:  ad 65 2c 64 eb 95 9b dc fe 41 5e 17 a6 da 6c 5b\nMyFile(0999)\:  69 cc 02 ba 14 2c 16 24 9c 4a dc cd d0 f7 52 67\nMyFile(0999)\:  73 f1 2d a0 23 fd 7e f4 31 ca 2d 70 ca 89 0b 04\nMyFile(0999)\:  db 2e a6 4f 70 6e 9e ce bd 58 89 e2 53 59 9e 6e\nMyFile(0999)\:  5a 92 65 e2 88 3f 0c 94 19 a3 dd e5 e8 9d 95 13\nMyFile(0999)\:  ed 29 db ab 70 12 dc 5a ca 6b 17 ab 52 82 54 b1\nMyFile(0999)\: value of 'crt->rsa.E' (32 bits) is\:\nMyFile(0999)\:  00 01 00 01\n"
+debug_print_crt:"data_files/server1.crt":"MyFile":999:"PREFIX_":"MyFile(0999)\: PREFIX_ #1\:\nMyFile(0999)\: cert. version \: 3\nMyFile(0999)\: serial number \: 01\nMyFile(0999)\: issuer name   \: C=NL, O=PolarSSL, CN=PolarSSL Test CA\nMyFile(0999)\: subject name  \: C=NL, O=PolarSSL, CN=PolarSSL Server 1\nMyFile(0999)\: issued  on    \: 2011-02-12 14\:44\:06\nMyFile(0999)\: expires on    \: 2021-02-12 14\:44\:06\nMyFile(0999)\: signed using  \: RSA+SHA1\nMyFile(0999)\: RSA key size  \: 2048 bits\nMyFile(0999)\: value of 'crt->rsa.N' (2048 bits) is\:\nMyFile(0999)\:  a9 02 1f 3d 40 6a d5 55 53 8b fd 36 ee 82 65 2e\nMyFile(0999)\:  15 61 5e 89 bf b8 e8 45 90 db ee 88 16 52 d3 f1\nMyFile(0999)\:  43 50 47 96 12 59 64 87 6b fd 2b e0 46 f9 73 be\nMyFile(0999)\:  dd cf 92 e1 91 5b ed 66 a0 6f 89 29 79 45 80 d0\nMyFile(0999)\:  83 6a d5 41 43 77 5f 39 7c 09 04 47 82 b0 57 39\nMyFile(0999)\:  70 ed a3 ec 15 19 1e a8 33 08 47 c1 05 42 a9 fd\nMyFile(0999)\:  4c c3 b4 df dd 06 1f 4d 10 51 40 67 73 13 0f 40\nMyFile(0999)\:  f8 6d 81 25 5f 0a b1 53 c6 30 7e 15 39 ac f9 5a\nMyFile(0999)\:  ee 7f 92 9e a6 05 5b e7 13 97 85 b5 23 92 d9 d4\nMyFile(0999)\:  24 06 d5 09 25 89 75 07 dd a6 1a 8f 3f 09 19 be\nMyFile(0999)\:  ad 65 2c 64 eb 95 9b dc fe 41 5e 17 a6 da 6c 5b\nMyFile(0999)\:  69 cc 02 ba 14 2c 16 24 9c 4a dc cd d0 f7 52 67\nMyFile(0999)\:  73 f1 2d a0 23 fd 7e f4 31 ca 2d 70 ca 89 0b 04\nMyFile(0999)\:  db 2e a6 4f 70 6e 9e ce bd 58 89 e2 53 59 9e 6e\nMyFile(0999)\:  5a 92 65 e2 88 3f 0c 94 19 a3 dd e5 e8 9d 95 13\nMyFile(0999)\:  ed 29 db ab 70 12 dc 5a ca 6b 17 ab 52 82 54 b1\nMyFile(0999)\: value of 'crt->rsa.E' (17 bits) is\:\nMyFile(0999)\:  01 00 01\n"
 
+Debug print mpi #1
+depends_on:POLARSSL_DEBUG_C
+debug_print_mpi:16:"01020304050607":"MyFile":999:"VALUE":"MyFile(0999)\: value of 'VALUE' (49 bits) is\:\nMyFile(0999)\:  01 02 03 04 05 06 07\n"
+
+Debug print mpi #2
+depends_on:POLARSSL_DEBUG_C
+debug_print_mpi:16:"00000000000007":"MyFile":999:"VALUE":"MyFile(0999)\: value of 'VALUE' (3 bits) is\:\nMyFile(0999)\:  07\n"
+
+Debug print mpi #3
+depends_on:POLARSSL_DEBUG_C
+debug_print_mpi:16:"00000000000000":"MyFile":999:"VALUE":"MyFile(0999)\: value of 'VALUE' (0 bits) is\:\nMyFile(0999)\:  00\n"
+
+Debug print mpi #4
+depends_on:POLARSSL_DEBUG_C
+debug_print_mpi:16:"0941379d00fed1491fe15df284dfde4a142f68aa8d412023195cee66883e6290ffe703f4ea5963bf212713cee46b107c09182b5edcd955adac418bf4918e2889af48e1099d513830cec85c26ac1e158b52620e33ba8692f893efbb2f958b4424":"MyFile":999:"VALUE":"MyFile(0999)\: value of 'VALUE' (764 bits) is\:\nMyFile(0999)\:  09 41 37 9d 00 fe d1 49 1f e1 5d f2 84 df de 4a\nMyFile(0999)\:  14 2f 68 aa 8d 41 20 23 19 5c ee 66 88 3e 62 90\nMyFile(0999)\:  ff e7 03 f4 ea 59 63 bf 21 27 13 ce e4 6b 10 7c\nMyFile(0999)\:  09 18 2b 5e dc d9 55 ad ac 41 8b f4 91 8e 28 89\nMyFile(0999)\:  af 48 e1 09 9d 51 38 30 ce c8 5c 26 ac 1e 15 8b\nMyFile(0999)\:  52 62 0e 33 ba 86 92 f8 93 ef bb 2f 95 8b 44 24\n"
+
+Debug print mpi #5
+depends_on:POLARSSL_DEBUG_C
+debug_print_mpi:16:"0000000000000000000000000000000000000000000000000000000941379d00fed1491fe15df284dfde4a142f68aa8d412023195cee66883e6290ffe703f4ea5963bf212713cee46b107c09182b5edcd955adac418bf4918e2889af48e1099d513830cec85c26ac1e158b52620e33ba8692f893efbb2f958b4424":"MyFile":999:"VALUE":"MyFile(0999)\: value of 'VALUE' (764 bits) is\:\nMyFile(0999)\:  09 41 37 9d 00 fe d1 49 1f e1 5d f2 84 df de 4a\nMyFile(0999)\:  14 2f 68 aa 8d 41 20 23 19 5c ee 66 88 3e 62 90\nMyFile(0999)\:  ff e7 03 f4 ea 59 63 bf 21 27 13 ce e4 6b 10 7c\nMyFile(0999)\:  09 18 2b 5e dc d9 55 ad ac 41 8b f4 91 8e 28 89\nMyFile(0999)\:  af 48 e1 09 9d 51 38 30 ce c8 5c 26 ac 1e 15 8b\nMyFile(0999)\:  52 62 0e 33 ba 86 92 f8 93 ef bb 2f 95 8b 44 24\n"
+
+Debug print mpi #6
+depends_on:POLARSSL_DEBUG_C
+debug_print_mpi:16:"0000000000000000000000000000000000000000000000000000000041379d00fed1491fe15df284dfde4a142f68aa8d412023195cee66883e6290ffe703f4ea5963bf212713cee46b107c09182b5edcd955adac418bf4918e2889af48e1099d513830cec85c26ac1e158b52620e33ba8692f893efbb2f958b4424":"MyFile":999:"VALUE":"MyFile(0999)\: value of 'VALUE' (759 bits) is\:\nMyFile(0999)\:  41 37 9d 00 fe d1 49 1f e1 5d f2 84 df de 4a 14\nMyFile(0999)\:  2f 68 aa 8d 41 20 23 19 5c ee 66 88 3e 62 90 ff\nMyFile(0999)\:  e7 03 f4 ea 59 63 bf 21 27 13 ce e4 6b 10 7c 09\nMyFile(0999)\:  18 2b 5e dc d9 55 ad ac 41 8b f4 91 8e 28 89 af\nMyFile(0999)\:  48 e1 09 9d 51 38 30 ce c8 5c 26 ac 1e 15 8b 52\nMyFile(0999)\:  62 0e 33 ba 86 92 f8 93 ef bb 2f 95 8b 44 24\n"
diff --git a/tests/suites/test_suite_debug.function b/tests/suites/test_suite_debug.function
index b95c1cb..4efa1e9 100644
--- a/tests/suites/test_suite_debug.function
+++ b/tests/suites/test_suite_debug.function
@@ -37,3 +37,27 @@
     TEST_ASSERT( strcmp( buffer.buf, {result_str} ) == 0 );
 }
 END_CASE
+
+BEGIN_CASE
+debug_print_mpi:radix:value:file:line:prefix:result_str
+{
+    ssl_context ssl;
+    struct buffer_data buffer;
+    mpi val;
+
+    mpi_init( &val, NULL );
+
+    memset( &ssl, 0, sizeof( ssl_context ) );
+    memset( buffer.buf, 0, 2000 );
+    buffer.ptr = buffer.buf; 
+
+    TEST_ASSERT( mpi_read_string( &val, {radix}, {value} ) == 0 );
+    ssl_set_dbg(&ssl, string_debug, &buffer);
+
+    debug_print_mpi( &ssl, 0, {file}, {line}, {prefix}, &val);
+
+    TEST_ASSERT( strcmp( buffer.buf, {result_str} ) == 0 );
+}
+END_CASE
+
+