diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index af875bf..268e160 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -117,6 +117,7 @@ if(WIN32) # The samples are currently only GMDLs based, and thus require Windows
     regression_test(test_oscillat_sample_stereo ENVELOPE)
 endif()
 regression_test(test_oscillat_unison ENVELOPE)
+regression_test(test_oscillat_unison_phase ENVELOPE)
 regression_test(test_oscillat_unison_stereo ENVELOPE)
 regression_test(test_oscillat_lfo "ENVELOPE;VCO_SINE;VCO_PULSE;FOP_MULP2")
 regression_test(test_oscillat_transposemod "VCO_SINE;ENVELOPE;FOP_MULP;FOP_PUSH;SEND")
diff --git a/tests/expected_output/test_oscillat_unison_phase.raw b/tests/expected_output/test_oscillat_unison_phase.raw
new file mode 100644
index 0000000..4b6b8b4
Binary files /dev/null and b/tests/expected_output/test_oscillat_unison_phase.raw differ
diff --git a/tests/test_oscillat_unison_phase.yml b/tests/test_oscillat_unison_phase.yml
new file mode 100644
index 0000000..e4c24f7
--- /dev/null
+++ b/tests/test_oscillat_unison_phase.yml
@@ -0,0 +1,22 @@
+bpm: 100
+rowsperbeat: 4
+score:
+    rowsperpattern: 16
+    length: 1
+    tracks:
+        - numvoices: 1
+          order: [0]
+          patterns: [[64, 0, 68, 0, 32, 0, 0, 0, 75, 0, 78, 0, 0, 0, 0, 0]]
+patch:
+    - numvoices: 1
+      units:
+        - type: envelope
+          parameters: {attack: 32, decay: 32, gain: 128, release: 64, stereo: 0, sustain: 64}
+        - type: oscillator
+          parameters: {color: 128, detune: 0, gain: 32, lfo: 0, phase: 0, shape: 64, stereo: 0, transpose: 64, type: 1, unison: 3}
+        - type: mulp
+          parameters: {stereo: 0}
+        - type: push
+          parameters: {stereo: 0}
+        - type: out
+          parameters: {gain: 128, stereo: 1}