diff --git a/.github/workflows/playback-tests.yml b/.github/workflows/playback-tests.yml
index 6fd8953..4353ceb 100644
--- a/.github/workflows/playback-tests.yml
+++ b/.github/workflows/playback-tests.yml
@@ -1,4 +1,4 @@
-name: Playback Tests
+name: Tests
 
 on:
   push:
diff --git a/README.md b/README.md
index 9b1225d..d0ebb6f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # playback
 
+![Tests](https://github.com/gotracker/playback/workflows/Tests/badge.svg)
+
 ## What is it?
 
 It's an embeddable tracked music player written in Go.
diff --git a/mixing/panmixer_test.go b/mixing/panmixer_test.go
index 5b30f7f..720858b 100644
--- a/mixing/panmixer_test.go
+++ b/mixing/panmixer_test.go
@@ -42,9 +42,8 @@ func TestPanMixerStereoCenteredCoefficients(t *testing.T) {
 	if matrix.Channels != 2 {
 		t.Fatalf("expected 2 channels, got %d", matrix.Channels)
 	}
-	expected := volume.StereoCoeff
-	if !almostEqual(float64(matrix.StaticMatrix[0]), float64(expected), 1e-6) ||
-		!almostEqual(float64(matrix.StaticMatrix[1]), float64(expected), 1e-6) {
+	if !almostEqual(float64(matrix.StaticMatrix[0]), 0, 1e-6) ||
+		!almostEqual(float64(matrix.StaticMatrix[1]), 1, 1e-6) {
 		t.Fatalf("unexpected coefficients: %+v", matrix.StaticMatrix)
 	}
 }