diff --git a/runners/bench_runner.h b/runners/bench_runner.h
index e88ee641..4d86ae25 100644
--- a/runners/bench_runner.h
+++ b/runners/bench_runner.h
@@ -138,8 +138,8 @@ intmax_t bench_define(size_t define);
     BENCH_DEF(BLOCK_SIZE,         0                                         ) \
     BENCH_DEF(BLOCK_COUNT,        DISK_SIZE/BLOCK_SIZE                      ) \
     BENCH_DEF(DISK_SIZE,          1024*1024                                 ) \
-    BENCH_DEF(CACHE_SIZE,         lfs_max(64, lfs_max(READ_SIZE, PROG_SIZE))) \
-    BENCH_DEF(INLINE_SIZE,        BLOCK_SIZE/4                              ) \
+    BENCH_DEF(CACHE_SIZE,         lfs_max(16, lfs_max(READ_SIZE, PROG_SIZE))) \
+    BENCH_DEF(INLINE_SIZE,        BLOCK_SIZE/8                              ) \
     BENCH_DEF(BUD_SIZE,           BLOCK_SIZE/4                              ) \
     BENCH_DEF(LOOKAHEAD_SIZE,     16                                        ) \
     BENCH_DEF(BLOCK_CYCLES,       -1                                        ) \
diff --git a/runners/test_runner.h b/runners/test_runner.h
index cd9df993..8331b4e3 100644
--- a/runners/test_runner.h
+++ b/runners/test_runner.h
@@ -137,8 +137,8 @@ intmax_t test_define(size_t define);
     TEST_DEF(BLOCK_SIZE,         0                                          ) \
     TEST_DEF(BLOCK_COUNT,        DISK_SIZE/BLOCK_SIZE                       ) \
     TEST_DEF(DISK_SIZE,          1024*1024                                  ) \
-    TEST_DEF(CACHE_SIZE,         lfs_max(64, lfs_max(READ_SIZE, PROG_SIZE)) ) \
-    TEST_DEF(INLINE_SIZE,        BLOCK_SIZE/4                               ) \
+    TEST_DEF(CACHE_SIZE,         lfs_max(16, lfs_max(READ_SIZE, PROG_SIZE)) ) \
+    TEST_DEF(INLINE_SIZE,        BLOCK_SIZE/8                               ) \
     TEST_DEF(BUD_SIZE,           BLOCK_SIZE/4                               ) \
     TEST_DEF(LOOKAHEAD_SIZE,     16                                         ) \
     TEST_DEF(BLOCK_CYCLES,       -1                                         ) \
diff --git a/tests/test_ftree.toml b/tests/test_ftree.toml
index 5dc6a21e..f25cb444 100644
--- a/tests/test_ftree.toml
+++ b/tests/test_ftree.toml
@@ -510,6 +510,7 @@ code = '''
 # write files incrementally
 [cases.test_ftree_incr]
 defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
+defines.CHUNK = [4, 1]
 defines.SYNC = [false, true]
 defines.REMOUNT = [false, true]
 reentrant = true
@@ -530,7 +531,9 @@ code = '''
     uint32_t prng = 42;
     for (lfs_size_t i = 0; i < SIZE; i++) {
         wbuf[i] = 'a' + (TEST_PRNG(&prng) % 26);
-        lfsr_file_write(&lfs, &file, &wbuf[i], 1) => 1;
+    }
+    for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
+        lfsr_file_write(&lfs, &file, &wbuf[i], CHUNK) => CHUNK;
 
         // sync?
         if (SYNC) {