diff --git a/testdata/ffmpeg.d/cmd/prune/main.go b/testdata/ffmpeg.d/cmd/prune/main.go
index 2e1883d..8bfa34b 100644
--- a/testdata/ffmpeg.d/cmd/prune/main.go
+++ b/testdata/ffmpeg.d/cmd/prune/main.go
@@ -50,13 +50,13 @@ func Run(ctx context.Context, args []string) error {
 		for _, f := range files {
 			series = append(series, strings.Split(path.Base(f), ".")[0])
 		}
-		series = slices.Compact(series)
 		sort.Strings(series)
-		if len(series) < 1 {
-			continue
-		}
+		series = slices.Compact(series)
+		series = slices.DeleteFunc(series, func(s string) bool {
+			return path.Base(s) > time.Now().Add(-10*time.Minute).Format("2006-01-02T15-04-05.")
+		})
 
-		for _, series := range series[:len(series)-1] {
+		for _, series := range series {
 			if err := func() error {
 				seriesFiles := []string{}
 				for _, file := range files {
@@ -110,6 +110,7 @@ func seriesHasMovement(ctx context.Context, files []string, movementInterval tim
 		return false, err
 	}
 	fTime := fStat.ModTime()
+
 	for i := 1; i < len(files); i++ {
 		g := files[i]
 		gStat, err := os.Stat(g)
diff --git a/testdata/ffmpeg.d/cmd/prune/main_test.go b/testdata/ffmpeg.d/cmd/prune/main_test.go
index 92b9707..7040044 100644
--- a/testdata/ffmpeg.d/cmd/prune/main_test.go
+++ b/testdata/ffmpeg.d/cmd/prune/main_test.go
@@ -23,26 +23,29 @@ func TestRun(t *testing.T) {
 		t.Fatal(err)
 	}
 
+	seriesA := "2024-09-18T10-50-00"
+	seriesB := time.Now().Format("2006-01-02T15-04-05")
+
 	now := time.Now()
-	if err := os.WriteFile(path.Join(d, "series.0.jpg"), a, os.ModePerm); err != nil {
+	if err := os.WriteFile(path.Join(d, seriesA+".0.jpg"), a, os.ModePerm); err != nil {
 		t.Fatal(err)
-	} else if err := os.Chtimes(path.Join(d, "series.0.jpg"), now, now.Add(-4000*time.Millisecond)); err != nil {
+	} else if err := os.Chtimes(path.Join(d, seriesA+".0.jpg"), now, now.Add(-4000*time.Millisecond)); err != nil {
 		t.Fatal(err)
-	} else if err := os.WriteFile(path.Join(d, "series.1.jpg"), a, os.ModePerm); err != nil {
+	} else if err := os.WriteFile(path.Join(d, seriesA+".1.jpg"), a, os.ModePerm); err != nil {
 		t.Fatal(err)
-	} else if err := os.Chtimes(path.Join(d, "series.1.jpg"), now, now.Add(-3500*time.Millisecond)); err != nil {
+	} else if err := os.Chtimes(path.Join(d, seriesA+".1.jpg"), now, now.Add(-3500*time.Millisecond)); err != nil {
 		t.Fatal(err)
-	} else if err := os.WriteFile(path.Join(d, "series.2.jpg"), b, os.ModePerm); err != nil {
+	} else if err := os.WriteFile(path.Join(d, seriesA+".2.jpg"), b, os.ModePerm); err != nil {
 		t.Fatal(err)
-	} else if err := os.Chtimes(path.Join(d, "series.2.jpg"), now, now.Add(-3000*time.Millisecond)); err != nil {
+	} else if err := os.Chtimes(path.Join(d, seriesA+".2.jpg"), now, now.Add(-3000*time.Millisecond)); err != nil {
 		t.Fatal(err)
-	} else if err := os.WriteFile(path.Join(d, "series.3.jpg"), b, os.ModePerm); err != nil {
+	} else if err := os.WriteFile(path.Join(d, seriesA+".3.jpg"), b, os.ModePerm); err != nil {
 		t.Fatal(err)
-	} else if err := os.Chtimes(path.Join(d, "series.3.jpg"), now, now.Add(-2500*time.Millisecond)); err != nil {
+	} else if err := os.Chtimes(path.Join(d, seriesA+".3.jpg"), now, now.Add(-2500*time.Millisecond)); err != nil {
 		t.Fatal(err)
-	} else if err := os.WriteFile(path.Join(d, "zlast.0.jpg"), b, os.ModePerm); err != nil {
+	} else if err := os.WriteFile(path.Join(d, seriesB+".0.jpg"), b, os.ModePerm); err != nil {
 		t.Fatal(err)
-	} else if err := os.Chtimes(path.Join(d, "zlast.0.jpg"), now, now.Add(-2000*time.Millisecond)); err != nil {
+	} else if err := os.Chtimes(path.Join(d, seriesB+".0.jpg"), now, now.Add(-2000*time.Millisecond)); err != nil {
 		t.Fatal(err)
 	}
 
@@ -58,7 +61,7 @@ func TestRun(t *testing.T) {
 		t.Fatal("failed to lsf for results:", err)
 	} else if len(results) != 1 {
 		t.Fatal(results)
-	} else if path.Base(results[0]) != "series.gif" {
+	} else if path.Base(results[0]) != seriesA+".gif" {
 		t.Fatal(results)
 	}
 
@@ -66,7 +69,7 @@ func TestRun(t *testing.T) {
 		t.Fatal(err)
 	} else if len(records) != 1 {
 		t.Fatal(records)
-	} else if path.Base(records[0]) != "zlast.0.jpg" {
+	} else if path.Base(records[0]) != seriesB+".0.jpg" {
 		t.Fatal(err)
 	}
 }