diff --git a/tests/suites/main_test.function b/tests/suites/main_test.function
index 420ee76..61c7337 100644
--- a/tests/suites/main_test.function
+++ b/tests/suites/main_test.function
@@ -240,10 +240,13 @@
             test_snprintf( 5, "123",         3 ) != 0 );
 }
 
-int main()
+int main(int argc, const char *argv[])
 {
-    int ret, i, cnt, total_errors = 0, total_tests = 0, total_skipped = 0;
-    const char *filename = "TEST_FILENAME";
+    int testfile_index, testfile_count, ret, i, cnt;
+    int total_errors = 0, total_tests = 0, total_skipped = 0;
+    const char *default_filename = "TEST_FILENAME";
+    const char *test_filename = NULL;
+    const char **test_files = NULL;
     FILE *file;
     char buf[5000];
     char *params[50];
@@ -276,78 +279,98 @@
         return( 0 );
     }
 
-    file = fopen( filename, "r" );
-    if( file == NULL )
+    if ( argc <= 1 )
     {
-        mbedtls_fprintf( stderr, "Failed to open\n" );
-        return( 1 );
+        test_files = &default_filename;
+        testfile_count = 1;
+    }
+    else
+    {
+        test_files = &argv[1];
+        testfile_count = argc - 1;
     }
 
-    while( !feof( file ) )
+    for ( testfile_index = 0;
+          testfile_index < testfile_count;
+          testfile_index++ )
     {
-        int skip = 0;
+        test_filename = test_files[ testfile_index ];
 
-        if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
-            break;
-        mbedtls_fprintf( stdout, "%s%.66s", test_errors ? "\n" : "", buf );
-        mbedtls_fprintf( stdout, " " );
-        for( i = strlen( buf ) + 1; i < 67; i++ )
-            mbedtls_fprintf( stdout, "." );
-        mbedtls_fprintf( stdout, " " );
-        fflush( stdout );
-
-        total_tests++;
-
-        if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
-            break;
-        cnt = parse_arguments( buf, strlen(buf), params );
-
-        if( strcmp( params[0], "depends_on" ) == 0 )
+        file = fopen( test_filename, "r" );
+        if( file == NULL )
         {
-            for( i = 1; i < cnt; i++ )
-                if( dep_check( params[i] ) != 0 )
-                    skip = 1;
+            mbedtls_fprintf( stderr, "Failed to open test file: %s\n",
+                             test_filename );
+            return( 1 );
+        }
+
+        while( !feof( file ) )
+        {
+            int skip = 0;
+
+            if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
+                break;
+            mbedtls_fprintf( stdout, "%s%.66s", test_errors ? "\n" : "", buf );
+            mbedtls_fprintf( stdout, " " );
+            for( i = strlen( buf ) + 1; i < 67; i++ )
+                mbedtls_fprintf( stdout, "." );
+            mbedtls_fprintf( stdout, " " );
+            fflush( stdout );
+
+            total_tests++;
 
             if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
                 break;
             cnt = parse_arguments( buf, strlen(buf), params );
-        }
 
-        if( skip == 0 )
-        {
-            test_errors = 0;
-            ret = dispatch_test( cnt, params );
-        }
+            if( strcmp( params[0], "depends_on" ) == 0 )
+            {
+                for( i = 1; i < cnt; i++ )
+                    if( dep_check( params[i] ) != 0 )
+                        skip = 1;
 
-        if( skip == 1 || ret == 3 )
-        {
-            total_skipped++;
-            mbedtls_fprintf( stdout, "----\n" );
-            fflush( stdout );
-        }
-        else if( ret == 0 && test_errors == 0 )
-        {
-            mbedtls_fprintf( stdout, "PASS\n" );
-            fflush( stdout );
-        }
-        else if( ret == 2 )
-        {
-            mbedtls_fprintf( stderr, "FAILED: FATAL PARSE ERROR\n" );
-            fclose(file);
-            mbedtls_exit( 2 );
-        }
-        else
-            total_errors++;
+                if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
+                    break;
+                cnt = parse_arguments( buf, strlen(buf), params );
+            }
 
-        if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
-            break;
-        if( strlen(buf) != 0 )
-        {
-            mbedtls_fprintf( stderr, "Should be empty %d\n", (int) strlen(buf) );
-            return( 1 );
+            if( skip == 0 )
+            {
+                test_errors = 0;
+                ret = dispatch_test( cnt, params );
+            }
+
+            if( skip == 1 || ret == 3 )
+            {
+                total_skipped++;
+                mbedtls_fprintf( stdout, "----\n" );
+                fflush( stdout );
+            }
+            else if( ret == 0 && test_errors == 0 )
+            {
+                mbedtls_fprintf( stdout, "PASS\n" );
+                fflush( stdout );
+            }
+            else if( ret == 2 )
+            {
+                mbedtls_fprintf( stderr, "FAILED: FATAL PARSE ERROR\n" );
+                fclose(file);
+                mbedtls_exit( 2 );
+            }
+            else
+                total_errors++;
+
+            if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
+                break;
+            if( strlen(buf) != 0 )
+            {
+                mbedtls_fprintf( stderr, "Should be empty %d\n",
+                                 (int) strlen(buf) );
+                return( 1 );
+            }
         }
+        fclose(file);
     }
-    fclose(file);
 
     mbedtls_fprintf( stdout, "\n----------------------------------------------------------------------------\n\n");
     if( total_errors == 0 )