diff --git a/Makefile b/Makefile
index 8fd541c..634f4f5 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ sco: fetch html
 
 # Refresh listing, generate HTML and update listing provider.
 all:
-	/bin/php php/update-listing.php
+	/bin/php php/update-listing.php $(FLAGS)
 
 # Fetch room listing.
 fetch:
@@ -83,7 +83,7 @@ test-noninteractive: FLAGS = --verbose
 test-noninteractive: clean all
 
 # Run Continuous Integration tests.
-test-ci: FLAGS = --verbose --fast --no-color
+test-ci: FLAGS = --verbose --no-color
 test-ci: clean all
 
 # -- Aliases --
diff --git a/etc/hooks/post-commit b/etc/hooks/post-commit
index 8d31e89..0999a7e 100755
--- a/etc/hooks/post-commit
+++ b/etc/hooks/post-commit
@@ -1,20 +1,22 @@
-#!/bin/bash
+#!/bin/sh
 
 root="$(pwd)"
 branch=$(git symbolic-ref HEAD 2>/dev/null || echo "?")
 branch="${branch##refs/heads/}"
 
+# Only test changes on main branch
 if ! [ "$branch" = "main" ]; then
     exit 0;
 fi
 
+# Trigger cleanup if tests are interrupted.
 cleanup() {
-    echo -e "\033[31mTests aborted.\033[0m"
+    printf "\033[31mTests aborted.\033[0m"
     rm -rf "$root/.test";
     exit;
 }
 
-trap cleanup SIGHUP SIGINT SIGABRT SIGTERM;
+trap cleanup HUP INT ABRT TERM;
 
 cat <<EOF
 I see you've committed to $branch! Time to test.
@@ -22,22 +24,37 @@ I see you've committed to $branch! Time to test.
 
 EOF
 
+# Remove test directory if present.
 rm -rf "$root/.test"
+
+# Make and change into test directory.
 mkdir "$root/.test" || exit;
 cd "$root/.test" || exit;
+
+# Clone the current repository into the test directory and change into it.
 git clone .. repo 2>> "$root/.test/results"
 cd "$root/.test/repo" 2>> "$root/.test/results" || exit;
-if make test-ci &>> "$root/.test/results"; then
+
+touch "$root/.test/results";
+
+# Run tests and show certain lines of output if successful.
+if make test-ci > "$root/.test/results" 2>&1; then
     grep 'Done fetching communities' -A1 --color=no "$root/.test/results";
+	grep -E 'Generated [[:digit:]]+ listings' -B1 --color=no "$root/.test/results";
     cat <<EOF
 Tests passed.
-Run \`make dev\` to test it yourself.
+Run \`make dev\` to test the webpage yourself.
 EOF
 else
-    echo -e "\033[31mTests failed.\033[0m";
+	# Show end of output if tests were not successful.
+    printf "\033[31mTests failed.\033[0m";
     tail -n10 "$root/.test/results";
     echo "See $root/.test/results for the full log."
-    exit;
+    exit 1;
 fi
+
+# Forget the cloned repository has version control to decrease clutter.
+rm -rf "$root/.test/repo/.git" || exit;
+
+# Return to main repository
 cd "$root" || exit;
-# rm -rf .test