diff --git a/internal/db/psql/interest_test.go b/internal/db/psql/interest_test.go
new file mode 100644
index 0000000..a00e796
--- /dev/null
+++ b/internal/db/psql/interest_test.go
@@ -0,0 +1,112 @@
+package psql_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/gabehf/koito/internal/db"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// an llm wrote this because i didn't feel like it. it looks like it works, although
+// it could stand to be more thorough
+func TestGetInterest(t *testing.T) {
+	truncateTestData(t)
+
+	ctx := context.Background()
+
+	// --- Setup Data ---
+
+	// Insert Artists
+	err := store.Exec(ctx, `
+		INSERT INTO artists (musicbrainz_id)
+		VALUES ('00000000-0000-0000-0000-000000000001'),
+		       ('00000000-0000-0000-0000-000000000002')`)
+	require.NoError(t, err)
+
+	// Insert Releases (Albums)
+	err = store.Exec(ctx, `
+		INSERT INTO releases (musicbrainz_id)
+		VALUES ('00000000-0000-0000-0000-000000000011')`)
+	require.NoError(t, err)
+
+	// Insert Tracks (Both on Release 1)
+	err = store.Exec(ctx, `
+		INSERT INTO tracks (musicbrainz_id, release_id)
+		VALUES ('11111111-1111-1111-1111-111111111111', 1),
+		       ('22222222-2222-2222-2222-222222222222', 1)`)
+	require.NoError(t, err)
+
+	// Link Artists to Tracks
+	// Artist 1 -> Track 1
+	// Artist 2 -> Track 2
+	err = store.Exec(ctx, `
+		INSERT INTO artist_tracks (artist_id, track_id)
+		VALUES (1, 1), (2, 2)`)
+	require.NoError(t, err)
+
+	// Insert Listens
+	// Track 1 (Artist 1, Release 1): 3 Listens
+	// Track 2 (Artist 2, Release 1): 2 Listens
+	err = store.Exec(ctx, `
+		INSERT INTO listens (user_id, track_id, listened_at) VALUES
+		(1, 1, NOW() - INTERVAL '1 hour'),
+		(1, 1, NOW() - INTERVAL '2 hours'),
+		(1, 1, NOW() - INTERVAL '3 hours'),
+		(1, 2, NOW() - INTERVAL '1 hour'),
+		(1, 2, NOW() - INTERVAL '2 hours')
+	`)
+	require.NoError(t, err)
+
+	// --- Test Validation ---
+
+	t.Run("Validation", func(t *testing.T) {
+		// Error: Missing Buckets
+		_, err := store.GetInterest(ctx, db.GetInterestOpts{ArtistID: 1})
+		assert.Error(t, err)
+		assert.Contains(t, err.Error(), "bucket count must be provided")
+
+		// Error: Missing ID
+		_, err = store.GetInterest(ctx, db.GetInterestOpts{Buckets: 10})
+		assert.Error(t, err)
+		assert.Contains(t, err.Error(), "must be provided")
+	})
+
+	// --- Test Data Retrieval ---
+	// Note: We use Buckets: 1 to ensure all listens are aggregated into a single result
+	// for easier assertion, avoiding complex date/time math in the test.
+
+	t.Run("Artist Interest", func(t *testing.T) {
+		// Artist 1 should have 3 listens (from Track 1)
+		buckets, err := store.GetInterest(ctx, db.GetInterestOpts{
+			ArtistID: 1,
+			Buckets:  1,
+		})
+		require.NoError(t, err)
+		require.Len(t, buckets, 1)
+		assert.EqualValues(t, 3, buckets[0].ListenCount, "Artist 1 should have 3 listens")
+	})
+
+	t.Run("Album Interest", func(t *testing.T) {
+		// Album 1 contains Track 1 (3 listens) and Track 2 (2 listens) = 5 Total
+		buckets, err := store.GetInterest(ctx, db.GetInterestOpts{
+			AlbumID: 1,
+			Buckets: 1,
+		})
+		require.NoError(t, err)
+		require.Len(t, buckets, 1)
+		assert.EqualValues(t, 5, buckets[0].ListenCount, "Album 1 should have 5 listens total")
+	})
+
+	t.Run("Track Interest", func(t *testing.T) {
+		// Track 2 should have 2 listens
+		buckets, err := store.GetInterest(ctx, db.GetInterestOpts{
+			TrackID: 2,
+			Buckets: 1,
+		})
+		require.NoError(t, err)
+		require.Len(t, buckets, 1)
+		assert.EqualValues(t, 2, buckets[0].ListenCount, "Track 2 should have 2 listens")
+	})
+}