diff --git a/tests/testthat/_snaps/serialize.md b/tests/testthat/_snaps/serialize.md
new file mode 100644
index 00000000000..c757d5ffa50
--- /dev/null
+++ b/tests/testthat/_snaps/serialize.md
@@ -0,0 +1,17 @@
+# serialization works
+
+    Code
+      g
+    Output
+      IGRAPH D--- 3 3 -- Ring graph
+      + attr: name (g/c), mutual (g/l), circular (g/l)
+      + edges:
+      [1] 1->2 2->3 3->1
+    Code
+      gs
+    Output
+      IGRAPH D--- 3 3 -- Ring graph
+      + attr: name (g/c), mutual (g/l), circular (g/l)
+      + edges:
+      [1] 1->2 2->3 3->1
+
diff --git a/tests/testthat/test-serialize.R b/tests/testthat/test-serialize.R
index d2009965f70..099ab76e3d8 100644
--- a/tests/testthat/test-serialize.R
+++ b/tests/testthat/test-serialize.R
@@ -5,4 +5,9 @@ test_that("serialization works", {
   gs <- unserialize(serialize(g, NULL))
 
   expect_identical(unclass(g)[-igraph_t_idx_env], unclass(gs)[-igraph_t_idx_env])
+
+  expect_snapshot({
+    g
+    gs
+  })
 })