diff --git a/src/nvim/os/fs.h b/src/nvim/os/fs.h
new file mode 100644
index 00000000000000..b03090dfeef674
--- /dev/null
+++ b/src/nvim/os/fs.h
@@ -0,0 +1,7 @@
+#ifndef NVIM_OS_FS_H
+#define NVIM_OS_FS_H
+
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "os/fs.h.generated.h"
+#endif
+#endif  // NVIM_OS_FS_H
diff --git a/test/unit/helpers.lua b/test/unit/helpers.lua
index 465b5536937b2a..4dbcaa5347e742 100644
--- a/test/unit/helpers.lua
+++ b/test/unit/helpers.lua
@@ -96,6 +96,7 @@ local init = only_separate(function()
     c.func(unpack(c.args))
   end
   libnvim.time_init()
+  libnvim.fs_init()
   libnvim.event_init()
   libnvim.early_init(nil)
   if child_calls_mod then
@@ -778,7 +779,8 @@ local function cppimport(path)
   return cimport(Paths.test_source_path .. '/test/includes/pre/' .. path)
 end
 
-cimport('./src/nvim/types.h', './src/nvim/main.h', './src/nvim/os/time.h')
+cimport('./src/nvim/types.h', './src/nvim/main.h', './src/nvim/os/time.h',
+        './src/nvim/os/fs.h')
 
 local function conv_enum(etab, eval)
   local n = tonumber(eval)