diff --git a/src/test/test_bugreports.c b/src/test/test_bugreports.c
index 0f235ab..8f50c5b 100644
--- a/src/test/test_bugreports.c
+++ b/src/test/test_bugreports.c
@@ -27,7 +27,7 @@ void teardown() {
 }
 
 TEST(nodemcu_full_fs_1) {
-  fs_reset_specific(0, 4096*20, 4096, 4096, 256);
+  fs_reset_specific(0, 0, 4096*20, 4096, 4096, 256);
 
   int res;
   spiffs_file fd;
@@ -86,7 +86,7 @@ TEST(nodemcu_full_fs_1) {
 } TEST_END(nodemcu_full_fs_1)
 
 TEST(nodemcu_full_fs_2) {
-  fs_reset_specific(0, 4096*22, 4096, 4096, 256);
+  fs_reset_specific(0, 0, 4096*22, 4096, 4096, 256);
 
   int res;
   spiffs_file fd;
@@ -166,13 +166,13 @@ TEST(nodemcu_full_fs_2) {
 
 TEST(magic_test) {
   // one obj lu page, not full
-  fs_reset_specific(0, 4096*16, 4096, 4096*1, 128);
+  fs_reset_specific(0, 0, 4096*16, 4096, 4096*1, 128);
   TEST_CHECK(SPIFFS_CHECK_MAGIC_POSSIBLE(FS));
   // one obj lu page, full
-  fs_reset_specific(0, 4096*16, 4096, 4096*2, 128);
+  fs_reset_specific(0, 0, 4096*16, 4096, 4096*2, 128);
   TEST_CHECK(!SPIFFS_CHECK_MAGIC_POSSIBLE(FS));
   // two obj lu pages, not full
-  fs_reset_specific(0, 4096*16, 4096, 4096*4, 128);
+  fs_reset_specific(0, 0, 4096*16, 4096, 4096*4, 128);
   TEST_CHECK(SPIFFS_CHECK_MAGIC_POSSIBLE(FS));
 
   return TEST_RES_OK;
@@ -180,7 +180,7 @@ TEST(magic_test) {
 } TEST_END(magic_test)
 
 TEST(nodemcu_309) {
-  fs_reset_specific(0, 4096*20, 4096, 4096, 256);
+  fs_reset_specific(0, 0, 4096*20, 4096, 4096, 256);
 
   int res;
   spiffs_file fd;
@@ -194,10 +194,14 @@ TEST(nodemcu_309) {
     int i;
     spiffs_stat s;
     res = SPIFFS_OK;
+    u8_t err = 0;
     for (i = 1; i <= 1280; i++) {
-      char *buf = "0123456789ABCDE";
+      char *buf = "0123456789ABCDE\n";
       res = SPIFFS_write(FS, fd, buf, strlen(buf));
-      if (res < 0) printf("err @ %i,%i\n", i, j);
+      if (!err && res < 0) {
+        printf("err @ %i,%i\n", i, j);
+        err = 1;
+      }
     }
   }
 
@@ -209,7 +213,7 @@ TEST(nodemcu_309) {
 
   SPIFFS_info(FS, &total, &used);
   printf("total:%i\nused:%i\nremain:%i\nerrno:%i\n", total, used, total-used, errno);
-  TEST_CHECK(total-used < 10000);
+  TEST_CHECK(total-used < 11000);
 
   spiffs_DIR d;
   struct spiffs_dirent e;
@@ -228,4 +232,115 @@ TEST(nodemcu_309) {
 
 } TEST_END(nodemcu_309)
 
+
+
+TEST(robert) {
+  // create a clean file system starting at address 0, 2 megabytes big,
+  // sector size 65536, block size 65536, page size 256
+  fs_reset_specific(0, 0, 1024*1024*2, 65536, 65536, 256);
+
+  int res;
+  spiffs_file fd;
+  int j;
+
+  // create three files
+  for (j = 1; j <= 3; j++) {
+    char fname[32];
+
+    sprintf(fname, "test%i.txt", j);
+    fd = SPIFFS_open(FS, fname, SPIFFS_RDWR | SPIFFS_CREAT | SPIFFS_TRUNC, 0);
+    TEST_CHECK(fd > 0);
+    int i;
+    res = SPIFFS_OK;
+    for (i = 0; i <= 999; i++) {
+      char *buf = "0123456789ABCDEF";
+      res = SPIFFS_write(FS, fd, buf, 16);
+    }
+    SPIFFS_close(FS, fd);
+
+    spiffs_stat s;
+    TEST_CHECK(SPIFFS_stat(FS, fname, &s) == SPIFFS_OK);
+    printf("file %s stat size %i\n", s.name, s.size);
+  }
+  int errno = SPIFFS_errno(FS);
+  TEST_CHECK(errno == SPIFFS_OK);
+
+  // unmount
+  SPIFFS_unmount(FS);
+
+  // remount
+  res = fs_mount_specific(0, 1024*1024*2, 65536, 65536, 256);
+  TEST_CHECK(res== SPIFFS_OK);
+
+
+  spiffs_DIR d;
+  struct spiffs_dirent e;
+  struct spiffs_dirent *pe = &e;
+
+  SPIFFS_opendir(FS, "/", &d);
+  while ((pe = SPIFFS_readdir(&d, pe))) {
+    printf("%s [%04x] size:%i\n", pe->name, pe->obj_id, pe->size);
+  }
+  SPIFFS_closedir(&d);
+
+  return TEST_RES_OK;
+
+} TEST_END(robert)
+
+
+TEST(spiffs_12) {
+  fs_reset_specific(0x4024c000, 0x4024c000 + 0, 192*1024, 4096, 4096*2, 256);
+
+  int res;
+  spiffs_file fd;
+  int j = 1;
+
+  while (1) {
+    char fname[32];
+    sprintf(fname, "file%i.txt", j);
+    fd = SPIFFS_open(FS, fname, SPIFFS_RDWR | SPIFFS_CREAT | SPIFFS_TRUNC | SPIFFS_DIRECT, 0);
+    if (fd <=0) break;
+
+    int i;
+    res = SPIFFS_OK;
+    for (i = 1; i <= 100; i++) {
+      char *buf = "0123456789ABCDE\n";
+      res = SPIFFS_write(FS, fd, buf, strlen(buf));
+      if (res < 0) break;
+    }
+    SPIFFS_close(FS, fd);
+    j++;
+  }
+
+  int errno = SPIFFS_errno(FS);
+  TEST_CHECK(errno == SPIFFS_ERR_FULL);
+
+  u32_t total;
+  u32_t used;
+
+  SPIFFS_info(FS, &total, &used);
+  printf("total:%i (%iK)\nused:%i (%iK)\nremain:%i (%iK)\nerrno:%i\n", total, total/1024, used, used/1024, total-used, (total-used)/1024, errno);
+
+  spiffs_DIR d;
+  struct spiffs_dirent e;
+  struct spiffs_dirent *pe = &e;
+
+  SPIFFS_opendir(FS, "/", &d);
+  while ((pe = SPIFFS_readdir(&d, pe))) {
+    printf("%s [%04x] size:%i\n", pe->name, pe->obj_id, pe->size);
+  }
+  SPIFFS_closedir(&d);
+
+  //SPIFFS_vis(FS);
+
+  //dump_page(FS, 0);
+  //dump_page(FS, 1);
+
+  return TEST_RES_OK;
+
+} TEST_END(spiffs_12)
+
+
+
+
 SUITE_END(bug_tests)
diff --git a/src/test/test_hydrogen.c b/src/test/test_hydrogen.c
index fdba160..e0764ff 100644
--- a/src/test/test_hydrogen.c
+++ b/src/test/test_hydrogen.c
@@ -592,7 +592,6 @@ TEST(simultaneous_write_append) {
 }
 TEST_END(simultaneous_write_append)
 
-
 TEST(file_uniqueness)
 {
   int res;
diff --git a/src/test/test_spiffs.c b/src/test/test_spiffs.c
index 8ad528a..5b8613f 100644
--- a/src/test/test_spiffs.c
+++ b/src/test/test_spiffs.c
@@ -24,7 +24,10 @@
 #include <dirent.h>
 #include <unistd.h>
 
+#define AREA(x) area[(x) - addr_offset]
+
 static unsigned char area[PHYS_FLASH_SIZE];
+static u32_t addr_offset = 0;
 
 static int erases[PHYS_FLASH_SIZE/SECTOR_SIZE];
 static char _path[256];
@@ -88,7 +91,7 @@ static s32_t _read(u32_t addr, u32_t size, u8_t *dst) {
     printf("FATAL read addr too high %08x + %08x > %08x\n", addr, size, SPIFFS_PHYS_ADDR + SPIFFS_FLASH_SIZE);
     exit(0);
   }
-  memcpy(dst, &area[addr], size);
+  memcpy(dst, &AREA(addr), size);
   return 0;
 }
 
@@ -117,14 +120,14 @@ static s32_t _write(u32_t addr, u32_t size, u8_t *src) {
 
   for (i = 0; i < size; i++) {
     if (((addr + i) & (__fs.cfg.log_page_size-1)) != offsetof(spiffs_page_header, flags)) {
-      if (check_valid_flash && ((area[addr + i] ^ src[i]) & src[i])) {
-        printf("trying to write %02x to %02x at addr %08x\n", src[i], area[addr + i], addr+i);
+      if (check_valid_flash && ((AREA(addr + i) ^ src[i]) & src[i])) {
+        printf("trying to write %02x to %02x at addr %08x\n", src[i], AREA(addr + i), addr+i);
         spiffs_page_ix pix = (addr + i) / LOG_PAGE;
         dump_page(&__fs, pix);
         return -1;
       }
     }
-    area[addr + i] &= src[i];
+    AREA(addr + i) &= src[i];
   }
   return 0;
 }
@@ -139,7 +142,7 @@ static s32_t _erase(u32_t addr, u32_t size) {
     return -1;
   }
   erases[(addr-__fs.cfg.phys_addr)/__fs.cfg.phys_erase_block]++;
-  memset(&area[addr], 0xff, size);
+  memset(&AREA(addr), 0xff, size);
   return 0;
 }
 
@@ -165,7 +168,7 @@ void hexdump(u32_t addr, u32_t len) {
           if (a-32+j < addr)
             printf(" ");
           else {
-            printf("%c", (area[a-32+j] < 32 || area[a-32+j] >= 0x7f) ? '.' : area[a-32+j]);
+            printf("%c", (AREA(a-32+j) < 32 || AREA(a-32+j) >= 0x7f) ? '.' : AREA(a-32+j));
           }
         }
       }
@@ -174,7 +177,7 @@ void hexdump(u32_t addr, u32_t len) {
     if (a < addr) {
       printf("  ");
     } else {
-      printf("%02x", area[a]);
+      printf("%02x", AREA(a));
     }
   }
   int j;
@@ -183,7 +186,7 @@ void hexdump(u32_t addr, u32_t len) {
     if (a-32+j < addr)
       printf(" ");
     else {
-      printf("%c", (area[a-32+j] < 32 || area[a-32+j] >= 0x7f) ? '.' : area[a-32+j]);
+      printf("%c", (AREA(a-32+j) < 32 || AREA(a-32+j) >= 0x7f) ? '.' : AREA(a-32+j));
     }
   }
   printf("\n");
@@ -198,9 +201,9 @@ void dump_page(spiffs *fs, spiffs_page_ix p) {
   } else {
     u32_t obj_id_addr = SPIFFS_BLOCK_TO_PADDR(fs, SPIFFS_BLOCK_FOR_PAGE(fs , p)) +
         SPIFFS_OBJ_LOOKUP_ENTRY_FOR_PAGE(fs, p) * sizeof(spiffs_obj_id);
-    spiffs_obj_id obj_id = *((spiffs_obj_id *)&area[obj_id_addr]);
+    spiffs_obj_id obj_id = *((spiffs_obj_id *)&AREA(obj_id_addr));
     // data page
-    spiffs_page_header *ph = (spiffs_page_header *)&area[addr];
+    spiffs_page_header *ph = (spiffs_page_header *)&AREA(addr);
     printf("DATA %04x:%04x  ", obj_id, ph->span_ix);
     printf("%s", ((ph->flags & SPIFFS_PH_FLAG_FINAL) == 0) ? "FIN " : "fin ");
     printf("%s", ((ph->flags & SPIFFS_PH_FLAG_DELET) == 0) ? "DEL " : "del ");
@@ -212,7 +215,7 @@ void dump_page(spiffs *fs, spiffs_page_ix p) {
       printf("OBJ_IX");
       if (ph->span_ix == 0) {
         printf("_HDR  ");
-        spiffs_page_object_ix_header *oix_hdr = (spiffs_page_object_ix_header *)&area[addr];
+        spiffs_page_object_ix_header *oix_hdr = (spiffs_page_object_ix_header *)&AREA(addr);
         printf("'%s'  %i bytes  type:%02x", oix_hdr->name, oix_hdr->size, oix_hdr->type);
       }
     } else {
@@ -228,14 +231,14 @@ void dump_page(spiffs *fs, spiffs_page_ix p) {
 void area_write(u32_t addr, u8_t *buf, u32_t size) {
   int i;
   for (i = 0; i < size; i++) {
-    area[addr + i] = *buf++;
+    AREA(addr + i) = *buf++;
   }
 }
 
 void area_read(u32_t addr, u8_t *buf, u32_t size) {
   int i;
   for (i = 0; i < size; i++) {
-    *buf++ = area[addr + i];
+    *buf++ = AREA(addr + i);
   }
 }
 
@@ -313,6 +316,10 @@ static void spiffs_check_cb_f(spiffs_check_type type, spiffs_check_report report
   }
 }
 
+void fs_set_addr_offset(u32_t offset) {
+  addr_offset = offset;
+}
+
 s32_t fs_mount_specific(u32_t phys_addr, u32_t phys_size,
     u32_t phys_sector_size,
     u32_t log_block_size, u32_t log_page_size) {
@@ -329,11 +336,12 @@ s32_t fs_mount_specific(u32_t phys_addr, u32_t phys_size,
   return SPIFFS_mount(&__fs, &c, _work, _fds, sizeof(_fds), _cache, sizeof(_cache), spiffs_check_cb_f);
 }
 
-void fs_reset_specific(u32_t phys_addr, u32_t phys_size,
+void fs_reset_specific(u32_t addr_offset, u32_t phys_addr, u32_t phys_size,
     u32_t phys_sector_size,
     u32_t log_block_size, u32_t log_page_size) {
+  fs_set_addr_offset(addr_offset);
   memset(area, 0xcc, sizeof(area));
-  memset(&area[phys_addr], 0xff, phys_size);
+  memset(&AREA(phys_addr), 0xff, phys_size);
   memset(&__fs, 0, sizeof(__fs));
 
   memset(erases,0,sizeof(erases));
@@ -361,7 +369,7 @@ void fs_reset_specific(u32_t phys_addr, u32_t phys_size,
 }
 
 void fs_reset() {
-  fs_reset_specific(SPIFFS_PHYS_ADDR, SPIFFS_FLASH_SIZE, SECTOR_SIZE, LOG_BLOCK, LOG_PAGE);
+  fs_reset_specific(0, SPIFFS_PHYS_ADDR, SPIFFS_FLASH_SIZE, SECTOR_SIZE, LOG_BLOCK, LOG_PAGE);
 }
 
 void set_flash_ops_log(int enable) {
@@ -609,8 +617,8 @@ void _teardown() {
   SPIFFS_check(FS);
   clear_test_path();
 
-  //hexdump_mem(&area[SPIFFS_PHYS_ADDR - 16], 32);
-  //hexdump_mem(&area[SPIFFS_PHYS_ADDR + SPIFFS_FLASH_SIZE - 16], 32);
+  //hexdump_mem(&AREA(SPIFFS_PHYS_ADDR - 16), 32);
+  //hexdump_mem(&AREA(SPIFFS_PHYS_ADDR + SPIFFS_FLASH_SIZE - 16), 32);
 }
 
 u32_t tfile_get_size(tfile_size s) {
diff --git a/src/test/test_spiffs.h b/src/test/test_spiffs.h
index 9236181..3fd1991 100644
--- a/src/test/test_spiffs.h
+++ b/src/test/test_spiffs.h
@@ -57,12 +57,13 @@ typedef struct  {
 
 
 void fs_reset();
-void fs_reset_specific(u32_t phys_addr, u32_t phys_size,
+void fs_reset_specific(u32_t addr_offset, u32_t phys_addr, u32_t phys_size,
     u32_t phys_sector_size,
     u32_t log_block_size, u32_t log_page_size);
 s32_t fs_mount_specific(u32_t phys_addr, u32_t phys_size,
     u32_t phys_sector_size,
     u32_t log_block_size, u32_t log_page_size);
+void fs_set_addr_offset(u32_t offset);
 int read_and_verify(char *name);
 int read_and_verify_fd(spiffs_file fd, char *name);
 void dump_page(spiffs *fs, spiffs_page_ix p);