diff --git a/libc/calls/fixenotdir.c b/libc/calls/fixenotdir.c
index 5b9146b38..31c9711f6 100644
--- a/libc/calls/fixenotdir.c
+++ b/libc/calls/fixenotdir.c
@@ -17,6 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
+#include "libc/intrin/kprintf.h"
 #include "libc/nt/enum/fileflagandattributes.h"
 #include "libc/nt/errors.h"
 #include "libc/nt/files.h"
@@ -44,10 +45,14 @@ static textwindows bool SubpathExistsThatsNotDirectory(char16_t *path) {
 
 textwindows dontinline int64_t __fix_enotdir3(int64_t rc, char16_t *path1,
                                               char16_t *path2) {
-  if (rc == -1 && errno == kNtErrorPathNotFound) {
-    if ((!path1 || !SubpathExistsThatsNotDirectory(path1)) &&
-        (!path2 || !SubpathExistsThatsNotDirectory(path2))) {
-      errno = kNtErrorFileNotFound;
+  if (rc == -1 && (errno == kNtErrorPathNotFound ||  // Windows returns ENOTDIR
+                   errno == kNtErrorInvalidName)) {  // e.g. has trailing slash
+    bool isdir = false;
+    if ((!path1 || !(isdir |= SubpathExistsThatsNotDirectory(path1))) &&
+        (!path2 || !(isdir |= SubpathExistsThatsNotDirectory(path2)))) {
+      errno = kNtErrorFileNotFound;  // ENOENT
+    } else if (isdir) {
+      errno = kNtErrorPathNotFound;  // ENOTDIR
     }
   }
   return rc;
diff --git a/libc/calls/getdomainname.c b/libc/calls/getdomainname.c
index 885499ccb..bbda62d70 100644
--- a/libc/calls/getdomainname.c
+++ b/libc/calls/getdomainname.c
@@ -19,7 +19,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/syscall_support-sysv.internal.h"
 #include "libc/dce.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/nt/enum/computernameformat.h"
diff --git a/libc/calls/gethostname.c b/libc/calls/gethostname.c
index 0439a735f..a01b84e7d 100644
--- a/libc/calls/gethostname.c
+++ b/libc/calls/gethostname.c
@@ -19,7 +19,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/syscall_support-sysv.internal.h"
 #include "libc/dce.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/nt/enum/computernameformat.h"
 #include "libc/sysv/errfuns.h"
diff --git a/libc/calls/mkntpath.c b/libc/calls/mkntpath.c
index df68f4d9b..17d5dbe17 100644
--- a/libc/calls/mkntpath.c
+++ b/libc/calls/mkntpath.c
@@ -194,5 +194,10 @@ textwindows int __mkntpath2(const char *path,
     n -= 4;
   }
 
+  // turn "foo\\." into "foo\\"
+  if (n > 2 && path16[n - 1] == u'.' && path16[n - 2] == u'\\') {
+    path16[--n] = 0;
+  }
+
   return n;
 }
diff --git a/libc/calls/open-nt.c b/libc/calls/open-nt.c
index b7d0fb26c..66da47629 100644
--- a/libc/calls/open-nt.c
+++ b/libc/calls/open-nt.c
@@ -22,6 +22,7 @@
 #include "libc/calls/state.internal.h"
 #include "libc/calls/syscall-nt.internal.h"
 #include "libc/calls/syscall_support-nt.internal.h"
+#include "libc/intrin/kprintf.h"
 #include "libc/nt/createfile.h"
 #include "libc/nt/enum/fileflagandattributes.h"
 #include "libc/nt/enum/filetype.h"
diff --git a/libc/calls/openpty.c b/libc/calls/openpty.c
index 8382ff2e3..c4801ff45 100644
--- a/libc/calls/openpty.c
+++ b/libc/calls/openpty.c
@@ -28,7 +28,6 @@
 #include "libc/calls/termios.internal.h"
 #include "libc/dce.h"
 #include "libc/intrin/asan.internal.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/log/rop.internal.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/at.h"
diff --git a/libc/calls/preadv.c b/libc/calls/preadv.c
index 81e2a8055..b98c598c9 100644
--- a/libc/calls/preadv.c
+++ b/libc/calls/preadv.c
@@ -25,7 +25,6 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/intrin/asan.internal.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/likely.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
diff --git a/libc/calls/pwritev.c b/libc/calls/pwritev.c
index f624aab5c..c2cade35d 100644
--- a/libc/calls/pwritev.c
+++ b/libc/calls/pwritev.c
@@ -25,7 +25,6 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/intrin/asan.internal.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/likely.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
diff --git a/libc/calls/readv.c b/libc/calls/readv.c
index 479ec157d..9c2d84d7a 100644
--- a/libc/calls/readv.c
+++ b/libc/calls/readv.c
@@ -25,13 +25,12 @@
 #include "libc/errno.h"
 #include "libc/intrin/asan.internal.h"
 #include "libc/intrin/describeflags.internal.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/likely.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
+#include "libc/runtime/zipos.internal.h"
 #include "libc/sock/internal.h"
 #include "libc/sysv/errfuns.h"
-#include "libc/runtime/zipos.internal.h"
 
 /**
  * Reads data to multiple buffers.
diff --git a/libc/calls/unveil.c b/libc/calls/unveil.c
index 0891cc0f4..89d99dcd0 100644
--- a/libc/calls/unveil.c
+++ b/libc/calls/unveil.c
@@ -31,7 +31,6 @@
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
 #include "libc/fmt/libgen.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/nexgen32e/vendor.internal.h"
diff --git a/libc/calls/wait4-nt.c b/libc/calls/wait4-nt.c
index 6e66cfef2..8c1897110 100644
--- a/libc/calls/wait4-nt.c
+++ b/libc/calls/wait4-nt.c
@@ -24,7 +24,6 @@
 #include "libc/calls/struct/rusage.h"
 #include "libc/calls/syscall_support-nt.internal.h"
 #include "libc/fmt/conv.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/nt/accounting.h"
diff --git a/libc/calls/writev.c b/libc/calls/writev.c
index 006b55e1c..0c4cf128b 100644
--- a/libc/calls/writev.c
+++ b/libc/calls/writev.c
@@ -24,7 +24,6 @@
 #include "libc/errno.h"
 #include "libc/intrin/asan.internal.h"
 #include "libc/intrin/describeflags.internal.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/likely.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
diff --git a/libc/intrin/memtrack.greg.c b/libc/intrin/memtrack.greg.c
index 7e2c8deb0..ce6f17e4e 100644
--- a/libc/intrin/memtrack.greg.c
+++ b/libc/intrin/memtrack.greg.c
@@ -23,7 +23,6 @@
 #include "libc/intrin/asan.internal.h"
 #include "libc/intrin/bits.h"
 #include "libc/intrin/directmap.internal.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/log/libfatal.internal.h"
 #include "libc/log/log.h"
diff --git a/libc/intrin/nocolor.c b/libc/intrin/nocolor.c
index d2ac956ab..60ad3efa9 100644
--- a/libc/intrin/nocolor.c
+++ b/libc/intrin/nocolor.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/log/internal.h"
 #include "libc/nt/version.h"
 #include "libc/runtime/runtime.h"
diff --git a/libc/intrin/strcpy.c b/libc/intrin/strcpy.c
index 8683c3c72..237b84822 100644
--- a/libc/intrin/strcpy.c
+++ b/libc/intrin/strcpy.c
@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
 #include "libc/intrin/asan.internal.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/str/str.h"
 #ifndef __aarch64__
 
diff --git a/libc/runtime/cocmd.c b/libc/runtime/cocmd.c
index 04abacac4..e4e1f3ded 100644
--- a/libc/runtime/cocmd.c
+++ b/libc/runtime/cocmd.c
@@ -27,7 +27,6 @@
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/intrin/_getenv.internal.h"
 #include "libc/intrin/bits.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/weaken.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"
diff --git a/libc/runtime/cosmo2.c b/libc/runtime/cosmo2.c
index c5f2f182b..3cae9c5d0 100644
--- a/libc/runtime/cosmo2.c
+++ b/libc/runtime/cosmo2.c
@@ -21,7 +21,6 @@
 #include "libc/calls/syscall-sysv.internal.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
diff --git a/libc/runtime/getlogin_r.c b/libc/runtime/getlogin_r.c
index 373e87f79..5bc9d1398 100644
--- a/libc/runtime/getlogin_r.c
+++ b/libc/runtime/getlogin_r.c
@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/syscall_support-nt.internal.h"
 #include "libc/dce.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/nt/accounting.h"
diff --git a/libc/runtime/hook.greg.c b/libc/runtime/hook.greg.c
index 5a7f931ca..c781336e5 100644
--- a/libc/runtime/hook.greg.c
+++ b/libc/runtime/hook.greg.c
@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "ape/sections.internal.h"
 #include "libc/calls/struct/sigset.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"
diff --git a/libc/runtime/zipos-access.c b/libc/runtime/zipos-access.c
index 535dead40..ebc49caa3 100644
--- a/libc/runtime/zipos-access.c
+++ b/libc/runtime/zipos-access.c
@@ -40,7 +40,7 @@ int __zipos_access(struct ZiposUri *name, int amode) {
 
   ssize_t cf;
   if ((cf = __zipos_find(z, name)) == -1) {
-    return enoent();
+    return -1;
   }
 
   int mode = GetZipCfileMode(z->map + cf);
diff --git a/libc/runtime/zipos-find.c b/libc/runtime/zipos-find.c
index 647f14f6f..71eb1417c 100644
--- a/libc/runtime/zipos-find.c
+++ b/libc/runtime/zipos-find.c
@@ -1,7 +1,7 @@
 /*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
 │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
 ╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
 │                                                                              │
 │ Permission to use, copy, modify, and/or distribute this software for         │
 │ any purpose with or without fee is hereby granted, provided that the         │
@@ -17,10 +17,17 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/runtime/zipos.internal.h"
+#include "libc/str/str.h"
+#include "libc/sysv/consts/s.h"
+#include "libc/sysv/errfuns.h"
 #include "libc/zip.internal.h"
 
-ssize_t __zipos_find(struct Zipos *zipos, struct ZiposUri *name) {
-  if (!name->len) {
+static ssize_t __zipos_scan(struct Zipos *zipos, struct ZiposUri *name) {
+  size_t len = name->len;
+  if (len && name->path[len - 1] == '/') {
+    --len;
+  }
+  if (!len) {
     return ZIPOS_SYNTHETIC_DIRECTORY;
   }
   bool found_subfile = false;
@@ -29,12 +36,11 @@ ssize_t __zipos_find(struct Zipos *zipos, struct ZiposUri *name) {
   for (size_t i = 0; i < n; ++i, c += ZIP_CFILE_HDRSIZE(zipos->map + c)) {
     const char *zname = ZIP_CFILE_NAME(zipos->map + c);
     size_t zsize = ZIP_CFILE_NAMESIZE(zipos->map + c);
-    if ((name->len == zsize ||
-         (name->len + 1 == zsize && zname[name->len] == '/')) &&
-        !memcmp(name->path, zname, name->len)) {
+    if ((len == zsize || (len + 1 == zsize && zname[len] == '/')) &&
+        !memcmp(name->path, zname, len)) {
       return c;
-    } else if (name->len + 1 < zsize && zname[name->len] == '/' &&
-               !memcmp(name->path, zname, name->len)) {
+    } else if (len + 1 < zsize && zname[len] == '/' &&
+               !memcmp(name->path, zname, len)) {
       found_subfile = true;
     }
   }
@@ -43,3 +49,28 @@ ssize_t __zipos_find(struct Zipos *zipos, struct ZiposUri *name) {
   }
   return -1;
 }
+
+// support code for open(), stat(), and access()
+ssize_t __zipos_find(struct Zipos *zipos, struct ZiposUri *name) {
+  ssize_t cf;
+  if ((cf = __zipos_scan(zipos, name)) == -1) {
+    // test if parent component exists that isn't a directory
+    char *p;
+    while ((p = memrchr(name->path, '/', name->len))) {
+      name->path[name->len = p - name->path] = 0;
+      if ((cf = __zipos_scan(zipos, name)) != -1 &&
+          cf != ZIPOS_SYNTHETIC_DIRECTORY &&
+          !S_ISDIR(GetZipCfileMode(zipos->map + cf))) {
+        return enotdir();
+      }
+    }
+    return enoent();
+  }
+  // test if we're opening "foo/" and "foo" isn't a directory
+  if (cf != ZIPOS_SYNTHETIC_DIRECTORY &&  //
+      name->len && name->path[name->len - 1] == '/' &&
+      !S_ISDIR(GetZipCfileMode(zipos->map + cf))) {
+    return enotdir();
+  }
+  return cf;
+}
diff --git a/libc/runtime/zipos-get.c b/libc/runtime/zipos-get.c
index 4fdf35a20..964b5bd67 100644
--- a/libc/runtime/zipos-get.c
+++ b/libc/runtime/zipos-get.c
@@ -21,7 +21,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/fmt/conv.h"
 #include "libc/intrin/cmpxchg.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/promises.internal.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/macros.internal.h"
diff --git a/libc/runtime/zipos-normpath.c b/libc/runtime/zipos-normpath.c
index f426131f6..9a6bdedce 100644
--- a/libc/runtime/zipos-normpath.c
+++ b/libc/runtime/zipos-normpath.c
@@ -21,8 +21,7 @@
 // normalizes zip filesystem path w/ overlapping strlcpy() style api
 // zip paths look like relative paths, but they're actually absolute
 // with respect to the archive; so similar to how /../etc would mean
-// /etc, we'd translate that here to "etc". when storing assets in a
-// zip archive, callers should append trailing slash for directories
+// /etc, we'd translate that here to "etc", and "etc/" slash is kept
 // returns strlen of 𝑑; returns 𝑛 when insufficient buffer available
 // nul terminator is guaranteed if n>0. it's fine if 𝑑 and 𝑠 overlap
 // test vectors for this algorithm in: test/libc/stdio/zipdir_test.c
@@ -49,8 +48,6 @@ size_t __zipos_normpath(char *d, const char *s, size_t n) {
   }
   // if we didn't overflow
   if (p < e) {
-    // trim trailing slashes and add nul terminator
-    while (p > d && p[-1] == '/') --p;
     *p = '\0';
   } else {
     // force nul-terminator to exist if possible
diff --git a/libc/runtime/zipos-open.c b/libc/runtime/zipos-open.c
index fa33adeb9..0f89a1c28 100644
--- a/libc/runtime/zipos-open.c
+++ b/libc/runtime/zipos-open.c
@@ -209,7 +209,7 @@ static int __zipos_open_impl(struct ZiposUri *name, int flags) {
   }
   ssize_t cf;
   if ((cf = __zipos_find(zipos, name)) == -1) {
-    return enoent();
+    return -1;
   }
   if (flags & O_EXCL) {
     return eexist();
diff --git a/libc/runtime/zipos-stat.c b/libc/runtime/zipos-stat.c
index a7b929071..813cbe2a8 100644
--- a/libc/runtime/zipos-stat.c
+++ b/libc/runtime/zipos-stat.c
@@ -23,14 +23,14 @@
 /**
  * Reads file metadata from αcτµαlly pδrταblε εxεcµταblε object store.
  *
- * @param uri is obtained via __zipos_parseuri()
+ * @param name is obtained via __zipos_parseuri()
  * @asyncsignalsafe
  */
 int __zipos_stat(struct ZiposUri *name, struct stat *st) {
   ssize_t cf;
   struct Zipos *zipos;
   if (!(zipos = __zipos_get())) return enoexec();
-  if ((cf = __zipos_find(zipos, name)) == -1) return enoent();
+  if ((cf = __zipos_find(zipos, name)) == -1) return -1;
   if (__zipos_stat_impl(zipos, cf, st)) return -1;
   st->st_ino = __zipos_inode(zipos, cf, name->path, name->len);
   return 0;
diff --git a/libc/runtime/zipos.internal.h b/libc/runtime/zipos.internal.h
index bc0013b37..c8e21f602 100644
--- a/libc/runtime/zipos.internal.h
+++ b/libc/runtime/zipos.internal.h
@@ -44,8 +44,8 @@ void __zipos_unlock(void);
 void __zipos_free(struct ZiposHandle *);
 struct Zipos *__zipos_get(void) pureconst;
 size_t __zipos_normpath(char *, const char *, size_t);
-ssize_t __zipos_parseuri(const char *, struct ZiposUri *);
 ssize_t __zipos_find(struct Zipos *, struct ZiposUri *);
+ssize_t __zipos_parseuri(const char *, struct ZiposUri *);
 uint64_t __zipos_inode(struct Zipos *, int64_t, const void *, size_t);
 int __zipos_open(struct ZiposUri *, int);
 int __zipos_access(struct ZiposUri *, int);
diff --git a/libc/sock/socket-nt.c b/libc/sock/socket-nt.c
index 6eaed651b..fbb4e4969 100644
--- a/libc/sock/socket-nt.c
+++ b/libc/sock/socket-nt.c
@@ -20,7 +20,6 @@
 #include "libc/calls/internal.h"
 #include "libc/calls/state.internal.h"
 #include "libc/errno.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/mem/mem.h"
 #include "libc/nt/enum/fileflagandattributes.h"
 #include "libc/nt/iphlpapi.h"
diff --git a/libc/sock/wsablock.c b/libc/sock/wsablock.c
index 7639f2c4d..9169ced24 100644
--- a/libc/sock/wsablock.c
+++ b/libc/sock/wsablock.c
@@ -20,7 +20,6 @@
 #include "libc/calls/internal.h"
 #include "libc/calls/sig.internal.h"
 #include "libc/errno.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/nt/enum/wait.h"
 #include "libc/nt/enum/wsa.h"
 #include "libc/nt/errors.h"
diff --git a/libc/stdio/dirstream.c b/libc/stdio/dirstream.c
index 02de208e8..9f3b7a274 100644
--- a/libc/stdio/dirstream.c
+++ b/libc/stdio/dirstream.c
@@ -24,7 +24,6 @@
 #include "libc/calls/syscall_support-nt.internal.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
 #include "libc/limits.h"
diff --git a/libc/thread/pthread_cancel.c b/libc/thread/pthread_cancel.c
index 9757834cc..ec38015e6 100644
--- a/libc/thread/pthread_cancel.c
+++ b/libc/thread/pthread_cancel.c
@@ -26,7 +26,6 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/intrin/atomic.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/sa.h"
diff --git a/libc/thread/pthread_create.c b/libc/thread/pthread_create.c
index 0e807fb9d..f4736e8d5 100644
--- a/libc/thread/pthread_create.c
+++ b/libc/thread/pthread_create.c
@@ -28,7 +28,6 @@
 #include "libc/intrin/bits.h"
 #include "libc/intrin/bsr.h"
 #include "libc/intrin/dll.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/log/internal.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/mem.h"
diff --git a/libc/thread/pthread_exit.c b/libc/thread/pthread_exit.c
index af44019a4..d7da9949e 100644
--- a/libc/thread/pthread_exit.c
+++ b/libc/thread/pthread_exit.c
@@ -20,7 +20,6 @@
 #include "libc/atomic.h"
 #include "libc/dce.h"
 #include "libc/intrin/atomic.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
 #include "libc/limits.h"
diff --git a/test/libc/calls/open_test.c b/test/libc/calls/open_test.c
index 30e49a227..fb3273a3a 100644
--- a/test/libc/calls/open_test.c
+++ b/test/libc/calls/open_test.c
@@ -47,6 +47,9 @@ TEST(open, enoent) {
 
 TEST(open, enotdir) {
   ASSERT_SYS(0, 0, touch("o", 0644));
+  ASSERT_SYS(ENOTDIR, -1, open("o/", O_RDONLY));
+  ASSERT_SYS(ENOTDIR, -1, open("o/.", O_RDONLY));
+  ASSERT_SYS(ENOTDIR, -1, open("o/./", O_RDONLY));
   ASSERT_SYS(ENOTDIR, -1, open("o/doesnotexist", O_RDONLY));
 }
 
diff --git a/test/libc/runtime/zipos_test.c b/test/libc/runtime/zipos_test.c
index 46a6109b9..52f0e3e35 100644
--- a/test/libc/runtime/zipos_test.c
+++ b/test/libc/runtime/zipos_test.c
@@ -17,6 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
+#include "libc/calls/struct/stat.h"
 #include "libc/errno.h"
 #include "libc/limits.h"
 #include "libc/mem/gc.h"
@@ -82,3 +83,12 @@ TEST(zipos_O_DIRECTORY, blocksOpeningOfNormalFiles) {
   ASSERT_SYS(ENOTDIR, -1,
              open("/zip/libc/testlib/hyperion.txt", O_RDONLY | O_DIRECTORY));
 }
+
+TEST(zipos, trailingComponents_willEnodirFile) {
+  struct stat st;
+  ASSERT_SYS(ENOTDIR, -1, open("/zip/libc/testlib/hyperion.txt/", O_RDONLY));
+  ASSERT_SYS(ENOTDIR, -1, open("/zip/libc/testlib/hyperion.txt/.", O_RDONLY));
+  ASSERT_SYS(ENOTDIR, -1, open("/zip/libc/testlib/hyperion.txt/./", O_RDONLY));
+  ASSERT_SYS(ENOTDIR, -1, open("/zip/libc/testlib/hyperion.txt/a/b", O_RDONLY));
+  ASSERT_SYS(ENOTDIR, -1, stat("/zip/libc/testlib/hyperion.txt/", &st));
+}
diff --git a/test/libc/stdio/zipdir_test.c b/test/libc/stdio/zipdir_test.c
index f281a2ddd..4dcdc4d9f 100644
--- a/test/libc/stdio/zipdir_test.c
+++ b/test/libc/stdio/zipdir_test.c
@@ -93,9 +93,10 @@ TEST(__zipos_normpath, vectors) {
       {"./", ""},
       {"..", ""},
       {"../", ""},
+      {"foo/", "foo/"},
       {"../abc/def", "abc/def"},
-      {"../abc/def/..", "abc"},
-      {"../abc/././././def/..", "abc"},
+      {"../abc/def/..", "abc/"},
+      {"../abc/././././def/..", "abc/"},
       {"////../abc/def", "abc/def"},
       {"/../def", "def"},
       {"../def", "def"},
@@ -121,11 +122,11 @@ TEST(__zipos_normpath, vectors) {
       {"../../../a", "a"},
       {"../a../../a", "a"},
       {"cccc/abc////..////.//../", ""},
-      {"aaaa/cccc/abc////..////.//../", "aaaa"},
-      {"..//////.///..////..////.//////abc////.////..////def//abc/..", "def"},
+      {"aaaa/cccc/abc////..////.//../", "aaaa/"},
+      {"..//////.///..////..////.//////abc////.////..////def//abc/..", "def/"},
       {"////////////..//////.///..////..////.//////abc////.////..////def//abc/"
        "..",
-       "def"},
+       "def/"},
   };
   int fails = 0;