diff --git a/maintainers/flake-module.nix b/maintainers/flake-module.nix
index a21fb214c..6b41b291d 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/nix-channel\.sh$''
               ''^tests/functional/nix-collect-garbage-d\.sh$''
               ''^tests/functional/nix-copy-ssh-common\.sh$''
               ''^tests/functional/nix-copy-ssh-ng\.sh$''
diff --git a/tests/functional/nix-channel.sh b/tests/functional/nix-channel.sh
index d0b772850..f23d4bbde 100755
--- a/tests/functional/nix-channel.sh
+++ b/tests/functional/nix-channel.sh
@@ -4,7 +4,7 @@ source common.sh
 
 clearProfiles
 
-rm -f $TEST_HOME/.nix-channels $TEST_HOME/.nix-profile
+rm -f "$TEST_HOME"/.nix-channels "$TEST_HOME"/.nix-profile
 
 # Test add/list/remove.
 nix-channel --add http://foo/bar xyzzy
@@ -12,8 +12,8 @@ nix-channel --list | grepQuiet http://foo/bar
 nix-channel --remove xyzzy
 [[ $(nix-channel --list-generations | wc -l) == 1 ]]
 
-[ -e $TEST_HOME/.nix-channels ]
-[ "$(cat $TEST_HOME/.nix-channels)" = '' ]
+[ -e "$TEST_HOME"/.nix-channels ]
+[ "$(cat "$TEST_HOME"/.nix-channels)" = '' ]
 
 # Test the XDG Base Directories support
 
@@ -25,47 +25,47 @@ nix-channel --remove xyzzy
 
 unset NIX_CONFIG
 
-[ -e $TEST_HOME/.local/state/nix/channels ]
-[ "$(cat $TEST_HOME/.local/state/nix/channels)" = '' ]
+[ -e "$TEST_HOME"/.local/state/nix/channels ]
+[ "$(cat "$TEST_HOME"/.local/state/nix/channels)" = '' ]
 
 # Create a channel.
-rm -rf $TEST_ROOT/foo
-mkdir -p $TEST_ROOT/foo
+rm -rf "$TEST_ROOT"/foo
+mkdir -p "$TEST_ROOT"/foo
 drvPath=$(nix-instantiate dependencies.nix)
-nix copy --to file://$TEST_ROOT/foo?compression="bzip2" $(nix-store -r "$drvPath")
-rm -rf $TEST_ROOT/nixexprs
-mkdir -p $TEST_ROOT/nixexprs
-cp "${config_nix}" dependencies.nix dependencies.builder*.sh $TEST_ROOT/nixexprs/
-ln -s dependencies.nix $TEST_ROOT/nixexprs/default.nix
-(cd $TEST_ROOT && tar cvf - nixexprs) | bzip2 > $TEST_ROOT/foo/nixexprs.tar.bz2
+nix copy --to file://"$TEST_ROOT"/foo?compression="bzip2" "$(nix-store -r "$drvPath")"
+rm -rf "$TEST_ROOT"/nixexprs
+mkdir -p "$TEST_ROOT"/nixexprs
+cp "${config_nix}" dependencies.nix dependencies.builder*.sh "$TEST_ROOT"/nixexprs/
+ln -s dependencies.nix "$TEST_ROOT"/nixexprs/default.nix
+(cd "$TEST_ROOT" && tar cvf - nixexprs) | bzip2 > "$TEST_ROOT"/foo/nixexprs.tar.bz2
 
 # Test the update action.
-nix-channel --add file://$TEST_ROOT/foo
+nix-channel --add file://"$TEST_ROOT"/foo
 nix-channel --update
 [[ $(nix-channel --list-generations | wc -l) == 2 ]]
 
 # Do a query.
-nix-env -qa \* --meta --xml --out-path > $TEST_ROOT/meta.xml
-grepQuiet 'meta.*description.*Random test package' $TEST_ROOT/meta.xml
-grepQuiet 'item.*attrPath="foo".*name="dependencies-top"' $TEST_ROOT/meta.xml
+nix-env -qa \* --meta --xml --out-path > "$TEST_ROOT"/meta.xml
+grepQuiet 'meta.*description.*Random test package' "$TEST_ROOT"/meta.xml
+grepQuiet 'item.*attrPath="foo".*name="dependencies-top"' "$TEST_ROOT"/meta.xml
 
 # Do an install.
 nix-env -i dependencies-top
-[ -e $TEST_HOME/.nix-profile/foobar ]
+[ -e "$TEST_HOME"/.nix-profile/foobar ]
 
 # Test updating from a tarball
-nix-channel --add file://$TEST_ROOT/foo/nixexprs.tar.bz2 bar
+nix-channel --add file://"$TEST_ROOT"/foo/nixexprs.tar.bz2 bar
 nix-channel --update
 
 # Do a query.
-nix-env -qa \* --meta --xml --out-path > $TEST_ROOT/meta.xml
-grepQuiet 'meta.*description.*Random test package' $TEST_ROOT/meta.xml
-grepQuiet 'item.*attrPath="bar".*name="dependencies-top"' $TEST_ROOT/meta.xml
-grepQuiet 'item.*attrPath="foo".*name="dependencies-top"' $TEST_ROOT/meta.xml
+nix-env -qa \* --meta --xml --out-path > "$TEST_ROOT"/meta.xml
+grepQuiet 'meta.*description.*Random test package' "$TEST_ROOT"/meta.xml
+grepQuiet 'item.*attrPath="bar".*name="dependencies-top"' "$TEST_ROOT"/meta.xml
+grepQuiet 'item.*attrPath="foo".*name="dependencies-top"' "$TEST_ROOT"/meta.xml
 
 # Do an install.
 nix-env -i dependencies-top
-[ -e $TEST_HOME/.nix-profile/foobar ]
+[ -e "$TEST_HOME"/.nix-profile/foobar ]
 
 # Test evaluation through a channel symlink (#9882).
 drvPath=$(nix-instantiate '<foo/dependencies.nix>')
@@ -73,9 +73,9 @@ drvPath=$(nix-instantiate '<foo/dependencies.nix>')
 # Add a test for the special case behaviour of 'nixpkgs' in the
 # channels for root (see EvalSettings::getDefaultNixPath()).
 if ! isTestOnNixOS; then
-    nix-channel --add file://$TEST_ROOT/foo nixpkgs
+    nix-channel --add file://"$TEST_ROOT"/foo nixpkgs
     nix-channel --update
-    mv $TEST_HOME/.local/state/nix/profiles $TEST_ROOT/var/nix/profiles/per-user/root
+    mv "$TEST_HOME"/.local/state/nix/profiles "$TEST_ROOT"/var/nix/profiles/per-user/root
     drvPath2=$(nix-instantiate '<nixpkgs>')
     [[ "$drvPath" = "$drvPath2" ]]
 fi