diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index cac80a4..20f3c8d 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -44,6 +44,7 @@
 add_test_suite(cipher cipher.blowfish)
 add_test_suite(cipher cipher.camellia)
 add_test_suite(cipher cipher.des)
+add_test_suite(cipher cipher.gcm)
 add_test_suite(cipher cipher.null)
 add_test_suite(cipher cipher.padding)
 add_test_suite(ctr_drbg)
diff --git a/tests/Makefile b/tests/Makefile
index ad678ea..4d2bcba 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -27,7 +27,7 @@
 		test_suite_arc4									\
 		test_suite_base64		test_suite_blowfish		\
 		test_suite_camellia		test_suite_cipher.aes	\
-		test_suite_cipher.arc4							\
+		test_suite_cipher.arc4	test_suite_cipher.gcm	\
 		test_suite_cipher.blowfish						\
 		test_suite_cipher.camellia						\
 		test_suite_cipher.des	test_suite_cipher.null	\
@@ -79,6 +79,10 @@
 	echo   "  Generate	$@"
 	scripts/generate_code.pl suites test_suite_cipher test_suite_cipher.arc4
 
+test_suite_cipher.gcm.c : suites/test_suite_cipher.function suites/test_suite_cipher.gcm.data scripts/generate_code.pl suites/helpers.function suites/main_test.function
+	echo   "  Generate	$@"
+	scripts/generate_code.pl suites test_suite_cipher test_suite_cipher.gcm
+
 test_suite_cipher.blowfish.c : suites/test_suite_cipher.function suites/test_suite_cipher.blowfish.data scripts/generate_code.pl suites/helpers.function suites/main_test.function
 	echo   "  Generate	$@"
 	scripts/generate_code.pl suites test_suite_cipher test_suite_cipher.blowfish
@@ -167,6 +171,10 @@
 	echo   "  CC    	$@.c"
 	$(CC) $(CFLAGS) $(OFLAGS) $@.c	$(LDFLAGS) -o $@
 
+test_suite_cipher.gcm: test_suite_cipher.gcm.c ../library/libpolarssl.a
+	echo   "  CC    	$@.c"
+	$(CC) $(CFLAGS) $(OFLAGS) $@.c	$(LDFLAGS) -o $@
+
 test_suite_cipher.blowfish: test_suite_cipher.blowfish.c ../library/libpolarssl.a
 	echo   "  CC    	$@.c"
 	$(CC) $(CFLAGS) $(OFLAGS) $@.c	$(LDFLAGS) -o $@
diff --git a/tests/suites/test_suite_cipher.function b/tests/suites/test_suite_cipher.function
index 1f7943a4..5377208 100644
--- a/tests/suites/test_suite_cipher.function
+++ b/tests/suites/test_suite_cipher.function
@@ -248,7 +248,7 @@
     TEST_ASSERT( totaloutlen == length ||
                  ( totaloutlen % cipher_get_block_size( &ctx_dec ) == 0 &&
                    totaloutlen < length &&
-                   totaloutlen + cipher_get_block_size( &ctx_dec ) > length ) );
+                   totaloutlen + cipher_get_block_size( &ctx_dec ) >= length ) );
 
     TEST_ASSERT( 0 == cipher_finish( &ctx_dec, decbuf + outlen, &outlen ) );
     totaloutlen += outlen;
diff --git a/tests/suites/test_suite_cipher.gcm.data b/tests/suites/test_suite_cipher.gcm.data
new file mode 100644
index 0000000..aacdca8
--- /dev/null
+++ b/tests/suites/test_suite_cipher.gcm.data
@@ -0,0 +1,110 @@
+Cipher Selftest
+depends_on:POLARSSL_SELF_TEST
+cipher_selftest:
+
+Decrypt empty buffer
+dec_empty_buf:
+
+AES-GCM Encrypt and decrypt 0 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:0:-1
+
+AES 128 GCM Encrypt and decrypt 1 byte
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:1:-1
+
+AES 128 GCM Encrypt and decrypt 2 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:2:-1
+
+AES 128 GCM Encrypt and decrypt 7 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:7:-1
+
+AES 128 GCM Encrypt and decrypt 8 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:8:-1
+
+AES 128 GCM Encrypt and decrypt 9 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:9:-1
+
+AES 128 GCM Encrypt and decrypt 15 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:15:-1
+
+AES 128 GCM Encrypt and decrypt 16 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:16:-1
+
+AES 128 GCM Encrypt and decrypt 17 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:17:-1
+
+AES 128 GCM Encrypt and decrypt 31 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:31:-1
+
+AES 128 GCM Encrypt and decrypt 32 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:32:-1
+
+AES 128 GCM Encrypt and decrypt 32 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:33:-1
+
+AES 128 GCM Encrypt and decrypt 47 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:47:-1
+
+AES 128 GCM Encrypt and decrypt 48 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:48:-1
+
+AES 128 GCM Encrypt and decrypt 49 bytes
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf:POLARSSL_CIPHER_AES_128_GCM:"AES-128-GCM":128:49:-1
+
+AES 128 GCM Encrypt and decrypt 0 bytes in multiple parts
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:0:0
+
+AES 128 GCM Encrypt and decrypt 1 bytes in multiple parts 1
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:1:0
+
+AES 128 GCM Encrypt and decrypt 1 bytes in multiple parts 2
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:0:1
+
+AES 128 GCM Encrypt and decrypt 16 bytes in multiple parts 1
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:16:0
+
+AES 128 GCM Encrypt and decrypt 16 bytes in multiple parts 2
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:0:16
+
+AES 128 GCM Encrypt and decrypt 16 bytes in multiple parts 3
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:1:15
+
+AES 128 GCM Encrypt and decrypt 16 bytes in multiple parts 4
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:15:1
+
+AES 128 GCM Encrypt and decrypt 22 bytes in multiple parts 1
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:15:7
+
+AES 128 GCM Encrypt and decrypt 22 bytes in multiple parts 1
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:16:6
+
+AES 128 GCM Encrypt and decrypt 22 bytes in multiple parts 1
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:17:6
+
+AES 128 GCM Encrypt and decrypt 32 bytes in multiple parts 1
+depends_on:POLARSSL_AES_C:POLARSSL_GCM_C
+enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_GCM:128:16:16