diff --git a/lfs.c b/lfs.c
index d2303fed..19e911eb 100644
--- a/lfs.c
+++ b/lfs.c
@@ -13182,8 +13182,7 @@ static int lfs_init(lfs_t *lfs, uint32_t flags,
     #ifdef LFS_GC
     // unknown gc flags?
     LFS_ASSERT((lfs->cfg->gc_flags & ~(
-            LFS_GC_MTREEONLY
-                | LFS_GC_MKCONSISTENT
+            LFS_GC_MKCONSISTENT
                 | LFS_GC_LOOKAHEAD
                 | LFS_GC_COMPACT
                 | LFS_GC_CKMETA
@@ -13967,7 +13966,6 @@ int lfsr_mount(lfs_t *lfs, uint32_t flags,
                 | LFS_IFDEF_CKFETCHES(LFS_M_CKFETCHES, 0)
                 | LFS_IFDEF_CKPARITY(LFS_M_CKPARITY, 0)
                 | LFS_IFDEF_CKDATACKSUMS(LFS_M_CKDATACKSUMS, 0)
-                | LFS_M_MTREEONLY
                 | LFS_M_MKCONSISTENT
                 | LFS_M_LOOKAHEAD
                 | LFS_M_COMPACT
@@ -14003,8 +14001,7 @@ int lfsr_mount(lfs_t *lfs, uint32_t flags,
 
     // run gc if requested
     if (flags & (
-            LFS_M_MTREEONLY
-                | LFS_M_MKCONSISTENT
+            LFS_M_MKCONSISTENT
                 | LFS_M_LOOKAHEAD
                 | LFS_M_COMPACT
                 | LFS_M_CKMETA
@@ -14012,8 +14009,7 @@ int lfsr_mount(lfs_t *lfs, uint32_t flags,
         lfsr_traversal_t t;
         err = lfsr_fs_gc_(lfs, &t,
                 flags & (
-                    LFS_M_MTREEONLY
-                        | LFS_M_MKCONSISTENT
+                    LFS_M_MKCONSISTENT
                         | LFS_M_LOOKAHEAD
                         | LFS_M_COMPACT
                         | LFS_M_CKMETA
@@ -14145,7 +14141,6 @@ int lfsr_format(lfs_t *lfs, uint32_t flags,
                 | LFS_IFDEF_CKFETCHES(LFS_F_CKFETCHES, 0)
                 | LFS_IFDEF_CKPARITY(LFS_F_CKPARITY, 0)
                 | LFS_IFDEF_CKDATACKSUMS(LFS_F_CKDATACKSUMS, 0)
-                | LFS_F_MTREEONLY
                 | LFS_F_COMPACT
                 | LFS_F_CKMETA
                 | LFS_F_CKDATA)) == 0);
@@ -14184,15 +14179,13 @@ int lfsr_format(lfs_t *lfs, uint32_t flags,
 
     // run gc if requested
     if (flags & (
-            LFS_F_MTREEONLY
-                | LFS_F_COMPACT
+            LFS_F_COMPACT
                 | LFS_F_CKMETA
                 | LFS_F_CKDATA)) {
         lfsr_traversal_t t;
         err = lfsr_fs_gc_(lfs, &t,
                 flags & (
-                    LFS_F_MTREEONLY
-                        | LFS_F_COMPACT
+                    LFS_F_COMPACT
                         | LFS_F_CKMETA
                         | LFS_F_CKDATA),
                 -1);
@@ -14456,8 +14449,7 @@ static int lfsr_fs_gc_(lfs_t *lfs, lfsr_traversal_t *t,
     // we should have check these earlier, but it doesn't hurt to
     // double check
     LFS_ASSERT((flags & ~(
-            LFS_GC_MTREEONLY
-                | LFS_GC_MKCONSISTENT
+            LFS_GC_MKCONSISTENT
                 | LFS_GC_LOOKAHEAD
                 | LFS_GC_COMPACT
                 | LFS_GC_CKMETA
diff --git a/lfs.h b/lfs.h
index e8aa8ecd..369b683f 100644
--- a/lfs.h
+++ b/lfs.h
@@ -173,7 +173,6 @@ enum lfs_type {
                         0x08000000  // Check data checksums on reads
 #endif
 
-#define LFS_F_MTREEONLY 0x00000800  // Only traverse the mtree
 #define LFS_F_COMPACT   0x00008000  // Compact metadata logs
 #define LFS_F_CKMETA    0x00010000  // Check metadata checksums
 #define LFS_F_CKDATA    0x00020000  // Check metadata + data checksums
@@ -197,7 +196,6 @@ enum lfs_type {
                         0x08000000  // Check data checksums on reads
 #endif
 
-#define LFS_M_MTREEONLY 0x00000800  // Only traverse the mtree
 #define LFS_M_MKCONSISTENT \
                         0x00001000  // Make the filesystem consistent
 #define LFS_M_LOOKAHEAD 0x00002000  // Populate lookahead buffer
@@ -257,8 +255,6 @@ enum lfs_btype {
 #define LFS_T_MUTATED   0x00000200  // Filesystem modified by traversal
 
 // GC flags
-#define LFS_GC_MTREEONLY \
-                        0x00000800  // Only traverse the mtree
 #define LFS_GC_MKCONSISTENT \
                         0x00001000  // Make the filesystem consistent
 #define LFS_GC_LOOKAHEAD \
diff --git a/tests/test_mount.toml b/tests/test_mount.toml
index edc746e4..8ef0803f 100644
--- a/tests/test_mount.toml
+++ b/tests/test_mount.toml
@@ -21,7 +21,6 @@ defines.CKPROGS = [false, true]
 defines.CKFETCHES = [false, true]
 defines.CKPARITY = [false, true]
 defines.CKDATACKSUMS = [false, true]
-defines.MTREEONLY = [false, true]
 defines.MKCONSISTENT = [false, true]
 defines.LOOKAHEAD = [false, true]
 defines.COMPACT = [false, true]
@@ -35,8 +34,6 @@ if = [
     '!RDONLY || !MKCONSISTENT',
     '!RDONLY || !LOOKAHEAD',
     '!RDONLY || !COMPACT',
-    '!MTREEONLY || !LOOKAHEAD',
-    '!MTREEONLY || !CKDATA',
 ]
 code = '''
     lfs_t lfs;
@@ -51,7 +48,6 @@ code = '''
                 | ((CKDATACKSUMS)
                     ? LFS_IFDEF_CKDATACKSUMS(LFS_M_CKDATACKSUMS, -1)
                     : 0)
-                | ((MTREEONLY) ? LFS_M_MTREEONLY : 0)
                 | ((MKCONSISTENT) ? LFS_M_MKCONSISTENT : 0)
                 | ((LOOKAHEAD) ? LFS_M_LOOKAHEAD : 0)
                 | ((COMPACT) ? LFS_M_COMPACT : 0)
@@ -89,7 +85,6 @@ defines.CKPROGS = [false, true]
 defines.CKFETCHES = [false, true]
 defines.CKPARITY = [false, true]
 defines.CKDATACKSUMS = [false, true]
-defines.MTREEONLY = [false, true]
 defines.COMPACT = [false, true]
 defines.CKMETA = [false, true]
 defines.CKDATA = [false, true]
@@ -98,7 +93,6 @@ if = [
     'LFS_IFDEF_CKFETCHES(true, !CKFETCHES)',
     'LFS_IFDEF_CKPARITY(true, !CKPARITY)',
     'LFS_IFDEF_CKDATACKSUMS(true, !CKDATACKSUMS)',
-    '!MTREEONLY || !CKDATA',
 ]
 code = '''
     lfs_t lfs;
@@ -110,7 +104,6 @@ code = '''
                 | ((CKDATACKSUMS)
                     ? LFS_IFDEF_CKDATACKSUMS(LFS_F_CKDATACKSUMS, -1)
                     : 0)
-                | ((MTREEONLY) ? LFS_M_MTREEONLY : 0)
                 | ((COMPACT) ? LFS_M_COMPACT : 0)
                 | ((CKMETA) ? LFS_M_CKMETA : 0)
                 | ((CKDATA) ? LFS_M_CKDATA : 0),