diff --git a/tests/functional/lang.sh b/tests/functional/lang.sh
index 3b0b52c17..8310ac1f6 100755
--- a/tests/functional/lang.sh
+++ b/tests/functional/lang.sh
@@ -117,7 +117,7 @@ for i in eval-okay-*.nix; do
             echo "FAIL: $i should evaluate"
             badExitCode=1
         fi
-    elif test ! -e "$i.exp-disabled"; then
+    else
         if
             expect 0 env \
                 NIX_PATH=dir3:dir4 \
diff --git a/tests/functional/lang/eval-okay-tail-call-1.exp-disabled b/tests/functional/lang/eval-okay-tail-call-1.exp-disabled
deleted file mode 100644
index f7393e847..000000000
--- a/tests/functional/lang/eval-okay-tail-call-1.exp-disabled
+++ /dev/null
@@ -1 +0,0 @@
-100000
diff --git a/tests/functional/lang/eval-okay-tail-call-1.nix b/tests/functional/lang/eval-okay-tail-call-1.nix
deleted file mode 100644
index a3962ce3f..000000000
--- a/tests/functional/lang/eval-okay-tail-call-1.nix
+++ /dev/null
@@ -1,3 +0,0 @@
-let
-  f = n: if n == 100000 then n else f (n + 1);
-in f 0