diff --git a/tests/suites/test_suite_ecp.data b/tests/suites/test_suite_ecp.data
index 41d3145..188d558 100644
--- a/tests/suites/test_suite_ecp.data
+++ b/tests/suites/test_suite_ecp.data
@@ -64,6 +64,12 @@
 ECP small multiplication #13
 ecp_small_mul:13:1:0:0
 
+ECP mod p192 readable
+ecp_fast_mod:SECP192R1:"000000000000010500000000000001040000000000000103000000000000010200000000000001010000000000000100"
+
+ECP mod p192 random
+ecp_fast_mod:SECP192R1:"36CF96B45D706A0954D89E52CE5F38517A2270E0175849B6F3740151D238CCABEF921437E475881D83BB69E4AA258EBD"
+
 ECP test vectors secp192r1
 ecp_test_vect:SECP192R1:"323FA3169D8E9C6593F59476BC142000AB5BE0E249C43426":"CD46489ECFD6C105E7B3D32566E2B122E249ABAADD870612":"68887B4877DF51DD4DC3D6FD11F0A26F8FD3844317916E9A":"631F95BB4A67632C9C476EEE9AB695AB240A0499307FCF62":"519A121680E0045466BA21DF2EEE47F5973B500577EF13D5":"FF613AB4D64CEE3A20875BDB10F953F6B30CA072C60AA57F":"AD420182633F8526BFE954ACDA376F05E5FF4F837F54FEBE":"4371545ED772A59741D0EDA32C671112B7FDDD51461FCF32"
 
diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index d81ff88..471bbec 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -126,3 +126,34 @@
     mpi_free( &xB ); mpi_free( &yB ); mpi_free( &xZ ); mpi_free( &yZ );
 }
 END_CASE
+
+BEGIN_CASE
+ecp_fast_mod:id:N
+{
+    ecp_group grp;
+    mpi N, R;
+
+    mpi_init( &N ); mpi_init( &R );
+    ecp_group_init( &grp );
+
+    TEST_ASSERT( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_{id} ) == 0 );
+    TEST_ASSERT( mpi_read_string( &N, 16, {N} ) == 0 );
+
+    /*
+     * Store correct result before we touch N
+     */
+    TEST_ASSERT( mpi_mod_mpi( &R, &N, &grp.P ) == 0 );
+
+    TEST_ASSERT( grp.modp( &N ) == 0 );
+    TEST_ASSERT( mpi_msb( &N ) <= grp.pbits + 3 );
+
+    /*
+     * Use mod rather than addition/substraction in case previous test fails
+     */
+    TEST_ASSERT( mpi_mod_mpi( &N, &N, &grp.P ) == 0 );
+    TEST_ASSERT( mpi_cmp_mpi( &N, &R ) == 0 );
+
+    mpi_free( &N ); mpi_free( &R );
+    ecp_group_free( &grp );
+}
+END_CASE