diff --git a/src/libutil-tests/archive.cc b/src/libutil-tests/archive.cc
index 386f7b857..427b29d41 100644
--- a/src/libutil-tests/archive.cc
+++ b/src/libutil-tests/archive.cc
@@ -42,6 +42,20 @@ INSTANTIATE_TEST_SUITE_P(
     NarTest,
     InvalidNarTest,
     ::testing::Values(
-        std::pair{"invalid-tag-instead-of-contents", "bad archive: expected tag 'contents', got 'AAAAAAAA'"}));
+        std::pair{"invalid-tag-instead-of-contents", "bad archive: expected tag 'contents', got 'AAAAAAAA'"},
+        // Unpacking a NAR with a NUL character in a file name should fail.
+        std::pair{"nul-character", "bad archive: NAR contains invalid file name 'f"},
+        // Likewise for a '.' filename.
+        std::pair{"dot", "bad archive: NAR contains invalid file name '.'"},
+        // Likewise for a '..' filename.
+        std::pair{"dotdot", "bad archive: NAR contains invalid file name '..'"},
+        // Likewise for a filename containing a slash.
+        std::pair{"slash", "bad archive: NAR contains invalid file name 'x/y'"},
+        // Likewise for an empty filename.
+        std::pair{"empty", "bad archive: NAR contains invalid file name ''"},
+        // Test that the 'executable' field cannot come before the 'contents' field.
+        std::pair{"executable-after-contents", "bad archive: expected tag ')', got 'executable'"},
+        // Test that the 'name' field cannot come before the 'node' field in a directory entry.
+        std::pair{"name-after-node", "bad archive: expected tag 'name'"}));
 
 } // namespace nix
diff --git a/tests/functional/dot.nar b/src/libutil-tests/data/nars/dot.nar
similarity index 100%
rename from tests/functional/dot.nar
rename to src/libutil-tests/data/nars/dot.nar
diff --git a/tests/functional/dotdot.nar b/src/libutil-tests/data/nars/dotdot.nar
similarity index 100%
rename from tests/functional/dotdot.nar
rename to src/libutil-tests/data/nars/dotdot.nar
diff --git a/tests/functional/empty.nar b/src/libutil-tests/data/nars/empty.nar
similarity index 100%
rename from tests/functional/empty.nar
rename to src/libutil-tests/data/nars/empty.nar
diff --git a/tests/functional/executable-after-contents.nar b/src/libutil-tests/data/nars/executable-after-contents.nar
similarity index 100%
rename from tests/functional/executable-after-contents.nar
rename to src/libutil-tests/data/nars/executable-after-contents.nar
diff --git a/tests/functional/name-after-node.nar b/src/libutil-tests/data/nars/name-after-node.nar
similarity index 100%
rename from tests/functional/name-after-node.nar
rename to src/libutil-tests/data/nars/name-after-node.nar
diff --git a/tests/functional/nul-character.nar b/src/libutil-tests/data/nars/nul-character.nar
similarity index 100%
rename from tests/functional/nul-character.nar
rename to src/libutil-tests/data/nars/nul-character.nar
diff --git a/tests/functional/slash.nar b/src/libutil-tests/data/nars/slash.nar
similarity index 100%
rename from tests/functional/slash.nar
rename to src/libutil-tests/data/nars/slash.nar
diff --git a/tests/functional/nars.sh b/tests/functional/nars.sh
index dd90345a6..a52c257bc 100755
--- a/tests/functional/nars.sh
+++ b/tests/functional/nars.sh
@@ -131,31 +131,3 @@ else
 fi
 
 rm -f "$TEST_ROOT/unicode-*"
-
-# Unpacking a NAR with a NUL character in a file name should fail.
-rm -rf "$TEST_ROOT/out"
-expectStderr 1 nix-store --restore "$TEST_ROOT/out" < nul-character.nar | grepQuiet "NAR contains invalid file name 'f"
-
-# Likewise for a '.' filename.
-rm -rf "$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 "$TEST_ROOT/out" < empty.nar | grepQuiet "NAR contains invalid file name ''"
-
-# Test that the 'executable' field cannot come before the 'contents' field.
-rm -rf "$TEST_ROOT/out"
-expectStderr 1 nix-store --restore "$TEST_ROOT/out" < executable-after-contents.nar | grepQuiet "expected tag ')', got 'executable'"
-
-# Test that the 'name' field cannot come before the 'node' field in a directory entry.
-rm -rf "$TEST_ROOT/out"
-expectStderr 1 nix-store --restore "$TEST_ROOT/out" < name-after-node.nar | grepQuiet "expected tag 'name'"