diff --git a/spec/flatdump_spec.lua b/spec/flatdump_spec.lua
index ed860ef..e8b1b84 100644
--- a/spec/flatdump_spec.lua
+++ b/spec/flatdump_spec.lua
@@ -49,4 +49,40 @@ describe('flatdump', function()
     }
     assert.same(expected, flatdump(input))
   end)
+
+  it('handles function environments', function()
+    local input = setfenv(function() end, { foo = 'bar' })
+    local expected = {
+      [1] = {
+        e = 't2',
+      },
+      [2] = {
+        sfoo = 'sbar',
+      },
+    }
+    assert.same(expected, flatdump(input))
+  end)
+
+  it('handles function environments on nested table entry', function()
+    local input = {
+      outer = {
+        inner = setfenv(function() end, { foo = 'bar' }),
+      },
+    }
+    local expected = {
+      [1] = {
+        souter = 't2',
+      },
+      [2] = {
+        sinner = 'f3',
+      },
+      [3] = {
+        e = 't4',
+      },
+      [4] = {
+        sfoo = 'sbar',
+      },
+    }
+    assert.same(expected, flatdump(input))
+  end)
 end)