diff --git a/tests/functional/repl_characterization/extra_data/repl-overlay-fail.nix b/tests/functional/repl_characterization/extra_data/repl-overlay-fail.nix
deleted file mode 100644
index 426127916..000000000
--- a/tests/functional/repl_characterization/extra_data/repl-overlay-fail.nix
+++ /dev/null
@@ -1 +0,0 @@
-info: final: prev: builtins.abort "uh oh!"
diff --git a/tests/functional/repl_characterization/extra_data/repl-overlay-no-dotdotdot.nix b/tests/functional/repl_characterization/extra_data/repl-overlay-no-dotdotdot.nix
deleted file mode 100644
index 1cced3324..000000000
--- a/tests/functional/repl_characterization/extra_data/repl-overlay-no-dotdotdot.nix
+++ /dev/null
@@ -1 +0,0 @@
-{currentSystem}: final: prev: {}
diff --git a/tests/functional/repl_characterization/extra_data/repl-overlay-packages-is-pkgs.nix b/tests/functional/repl_characterization/extra_data/repl-overlay-packages-is-pkgs.nix
deleted file mode 100644
index 57895a97f..000000000
--- a/tests/functional/repl_characterization/extra_data/repl-overlay-packages-is-pkgs.nix
+++ /dev/null
@@ -1,4 +0,0 @@
-info: final: prev:
-{
-  pkgs = final.packages.x86_64-linux;
-}
diff --git a/tests/functional/repl_characterization/extra_data/repl-overlays-compose-1.nix b/tests/functional/repl_characterization/extra_data/repl-overlays-compose-1.nix
deleted file mode 100644
index 055e9ea0f..000000000
--- a/tests/functional/repl_characterization/extra_data/repl-overlays-compose-1.nix
+++ /dev/null
@@ -1,7 +0,0 @@
-info: final: prev:
-{
-  var = prev.var + "b";
-
-  # We can access the final value of `var` here even though it isn't defined yet:
-  varUsingFinal = "final value is: " + final.newVar;
-}
diff --git a/tests/functional/repl_characterization/extra_data/repl-overlays-compose-2.nix b/tests/functional/repl_characterization/extra_data/repl-overlays-compose-2.nix
deleted file mode 100644
index e88407311..000000000
--- a/tests/functional/repl_characterization/extra_data/repl-overlays-compose-2.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-info: final: prev:
-{
-  var = prev.var + "c";
-
-  newVar = "puppy";
-}