diff --git a/test/decode_perf_test.cc b/test/decode_perf_test.cc
index 53594ae4d..ee26c3c04 100644
--- a/test/decode_perf_test.cc
+++ b/test/decode_perf_test.cc
@@ -28,7 +28,6 @@ namespace {
 #define VIDEO_NAME 0
 #define THREADS 1
 
-const int kMaxPsnr = 100;
 const double kUsecsInSec = 1000000.0;
 const char kNewEncodeOutputFile[] = "new_encode.ivf";
 
@@ -176,7 +175,7 @@ class VP9NewEncodeDecodePerfTest
               pkt->data.frame.sz);
   }
 
-  virtual bool DoDecode() { return false; }
+  virtual bool DoDecode() const { return false; }
 
   void set_speed(unsigned int speed) { speed_ = speed; }
 
diff --git a/test/encode_perf_test.cc b/test/encode_perf_test.cc
index 53dd29a4b..0bb435502 100644
--- a/test/encode_perf_test.cc
+++ b/test/encode_perf_test.cc
@@ -105,7 +105,7 @@ class VP9EncodePerfTest
   }
 
   // for performance reasons don't decode
-  virtual bool DoDecode() { return 0; }
+  virtual bool DoDecode() const { return false; }
 
   double min_psnr() const { return min_psnr_; }