diff --git a/tests/functional/dot.nar b/tests/functional/dot.nar
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index 000000000..3a9452f67
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diff --git a/tests/functional/dotdot.nar b/tests/functional/dotdot.nar
new file mode 100644
index 000000000..f8d019c39
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diff --git a/tests/functional/empty.nar b/tests/functional/empty.nar
new file mode 100644
index 000000000..43434f2b4
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diff --git a/tests/functional/nars.sh b/tests/functional/nars.sh
index 9f5f43dc6..68b9b45d9 100755
--- a/tests/functional/nars.sh
+++ b/tests/functional/nars.sh
@@ -92,3 +92,23 @@ else
     [[ -e $TEST_ROOT/out/â ]]
     [[ -e $TEST_ROOT/out/â ]]
 fi
+
+# Unpacking a NAR with a NUL character in a file name should fail.
+rm -rf "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < nul.nar | grepQuiet "NAR contains invalid file name 'f"
+
+# Likewise for a '.' filename.
+rm -rf "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < dot.nar | grepQuiet "NAR contains invalid file name '.'"
+
+# Likewise for a '..' filename.
+rm -rf "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < dotdot.nar | grepQuiet "NAR contains invalid file name '..'"
+
+# Likewise for a filename containing a slash.
+rm -rf "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < slash.nar | grepQuiet "NAR contains invalid file name 'x/y'"
+
+# Likewise for an empty filename.
+rm -rf "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < empty.nar | grepQuiet "NAR contains invalid file name ''"
diff --git a/tests/functional/nul.nar b/tests/functional/nul.nar
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index 000000000..9ae48baf6
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diff --git a/tests/functional/slash.nar b/tests/functional/slash.nar
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index 000000000..118a60216
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