diff --git a/tests/functional2/lang/fromTOML-overflowing/eval-okay-overflow.out.exp b/tests/functional2/lang/fromTOML-overflowing/eval-okay-overflow.out.exp
new file mode 100644
index 000000000..e241ca9ba
--- /dev/null
+++ b/tests/functional2/lang/fromTOML-overflowing/eval-okay-overflow.out.exp
@@ -0,0 +1 @@
+{ attr = 9223372036854775807; }
diff --git a/tests/functional2/lang/fromTOML-overflowing/eval-okay-underflow.out.exp b/tests/functional2/lang/fromTOML-overflowing/eval-okay-underflow.out.exp
new file mode 100644
index 000000000..83b822591
--- /dev/null
+++ b/tests/functional2/lang/fromTOML-overflowing/eval-okay-underflow.out.exp
@@ -0,0 +1 @@
+{ attr = -9223372036854775808; }
diff --git a/tests/functional2/lang/fromTOML-overflowing/in-overflow.nix b/tests/functional2/lang/fromTOML-overflowing/in-overflow.nix
new file mode 100644
index 000000000..17f0448b3
--- /dev/null
+++ b/tests/functional2/lang/fromTOML-overflowing/in-overflow.nix
@@ -0,0 +1 @@
+builtins.fromTOML ''attr = 9223372036854775808''
diff --git a/tests/functional2/lang/fromTOML-overflowing/in-underflow.nix b/tests/functional2/lang/fromTOML-overflowing/in-underflow.nix
new file mode 100644
index 000000000..923fdf354
--- /dev/null
+++ b/tests/functional2/lang/fromTOML-overflowing/in-underflow.nix
@@ -0,0 +1 @@
+builtins.fromTOML ''attr = -9223372036854775809''