diff --git a/tests/test_png.nim b/tests/test_png.nim
index 7fa59c1..719bb8b 100644
--- a/tests/test_png.nim
+++ b/tests/test_png.nim
@@ -17,10 +17,10 @@ for channels in 1 .. 4:
   var data: seq[uint8]
   for x in 0 ..< 16:
     for y in 0 ..< 16:
-        var components = newSeq[uint8](channels)
-        for i in 0 ..< channels:
-          components[i] = (x * 16).uint8
-        data.add(components)
+      var components = newSeq[uint8](channels)
+      for i in 0 ..< channels:
+        components[i] = (x * 16).uint8
+      data.add(components)
   let encoded = encodePng(16, 16, channels, data[0].addr, data.len)
 
 for file in pngSuiteCorruptedFiles: