diff --git a/maintainers/flake-module.nix b/maintainers/flake-module.nix
index f5ac5c489..8350fea5c 100644
--- a/maintainers/flake-module.nix
+++ b/maintainers/flake-module.nix
@@ -106,7 +106,6 @@
             enable = true;
             excludes = [
               # We haven't linted these files yet
-              ''^tests/functional/flakes/show\.sh$''
               ''^tests/functional/formatter\.sh$''
               ''^tests/functional/formatter\.simple\.sh$''
               ''^tests/functional/gc-auto\.sh$''
diff --git a/tests/functional/flakes/show.sh b/tests/functional/flakes/show.sh
index 7fcc6aca9..a08db115a 100755
--- a/tests/functional/flakes/show.sh
+++ b/tests/functional/flakes/show.sh
@@ -12,6 +12,7 @@ pushd "$flakeDir"
 # By default: Only show the packages content for the current system and no
 # legacyPackages at all
 nix flake show --json > show-output.json
+# shellcheck disable=SC2016
 nix eval --impure --expr '
 let show_output = builtins.fromJSON (builtins.readFile ./show-output.json);
 in
@@ -23,6 +24,7 @@ true
 
 # With `--all-systems`, show the packages for all systems
 nix flake show --json --all-systems > show-output.json
+# shellcheck disable=SC2016
 nix eval --impure --expr '
 let show_output = builtins.fromJSON (builtins.readFile ./show-output.json);
 in
@@ -33,6 +35,7 @@ true
 
 # With `--legacy`, show the legacy packages
 nix flake show --json --legacy > show-output.json
+# shellcheck disable=SC2016
 nix eval --impure --expr '
 let show_output = builtins.fromJSON (builtins.readFile ./show-output.json);
 in
@@ -80,6 +83,7 @@ cat >flake.nix <<EOF
 }
 EOF
 nix flake show --json --legacy --all-systems > show-output.json
+# shellcheck disable=SC2016
 nix eval --impure --expr '
 let show_output = builtins.fromJSON (builtins.readFile ./show-output.json);
 in
@@ -91,11 +95,12 @@ true
 # Test that nix flake show doesn't fail if one of the outputs contains
 # an IFD
 popd
-writeIfdFlake $flakeDir
-pushd $flakeDir
+writeIfdFlake "$flakeDir"
+pushd "$flakeDir"
 
 
 nix flake show --json > show-output.json
+# shellcheck disable=SC2016
 nix eval --impure --expr '
 let show_output = builtins.fromJSON (builtins.readFile ./show-output.json);
 in