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-rw-r--r--nixos/tests/activation/nix-channel.nix9
1 files changed, 9 insertions, 0 deletions
diff --git a/nixos/tests/activation/nix-channel.nix b/nixos/tests/activation/nix-channel.nix
index a01a66ebc1bf..d26ea98e56cc 100644
--- a/nixos/tests/activation/nix-channel.nix
+++ b/nixos/tests/activation/nix-channel.nix
@@ -11,7 +11,16 @@
   };
 
   testScript = { nodes, ... }: ''
+    machine.start(allow_reboot=True)
+
     assert machine.succeed("cat /root/.nix-channels") == "${nodes.machine.system.defaultChannel} nixos\n"
+
+    nixpkgs_unstable_channel = "https://nixos.org/channels/nixpkgs-unstable nixpkgs"
+    machine.succeed(f"echo '{nixpkgs_unstable_channel}' > /root/.nix-channels")
+
+    machine.reboot()
+
+    assert machine.succeed("cat /root/.nix-channels") == f"{nixpkgs_unstable_channel}\n"
   '';
 
 }