diff --git a/src/pulsecore/svolume_arm.c b/src/pulsecore/svolume_arm.c
index c2830cfd7..12660dd48 100644
--- a/src/pulsecore/svolume_arm.c
+++ b/src/pulsecore/svolume_arm.c
@@ -152,7 +152,7 @@ static void run_test (void) {
     memcpy (samples_orig, samples, sizeof (samples));
 
     for (i = 0; i < CHANNELS; i++)
-        volumes[i] = rand() >> 1;
+        volumes[i] = PA_CLAMP_VOLUME(rand() >> 1);
     for (padding = 0; padding < PADDING; padding++, i++)
         volumes[i] = volumes[padding];
 
diff --git a/src/pulsecore/svolume_mmx.c b/src/pulsecore/svolume_mmx.c
index 3e2992a29..5bfe6d4f3 100644
--- a/src/pulsecore/svolume_mmx.c
+++ b/src/pulsecore/svolume_mmx.c
@@ -267,7 +267,7 @@ static void run_test (void) {
     memcpy (samples_orig, samples, sizeof (samples));
 
     for (i = 0; i < CHANNELS; i++)
-        volumes[i] = rand() >> 1;
+        volumes[i] = PA_CLAMP_VOLUME(rand() >> 1);
         /* volumes[i] = 0x0000ffff; */
     for (padding = 0; padding < PADDING; padding++, i++)
         volumes[i] = volumes[padding];
diff --git a/src/pulsecore/svolume_sse.c b/src/pulsecore/svolume_sse.c
index 200482ec5..f3aa1edb2 100644
--- a/src/pulsecore/svolume_sse.c
+++ b/src/pulsecore/svolume_sse.c
@@ -277,7 +277,7 @@ static void run_test (void) {
     memcpy (samples_orig, samples, sizeof (samples));
 
     for (i = 0; i < CHANNELS; i++)
-        volumes[i] = rand() >> 1;
+        volumes[i] = PA_CLAMP_VOLUME(rand() >> 1);
     for (padding = 0; padding < PADDING; padding++, i++)
         volumes[i] = volumes[padding];