diff --git a/benchmark/test_array_allocation.cpp b/benchmark/test_array_allocation.cpp
index fda9bb6ab..e11a68fd8 100644
--- a/benchmark/test_array_allocation.cpp
+++ b/benchmark/test_array_allocation.cpp
@@ -231,33 +231,6 @@ public:
     }
 };
 
-class test3d : public benchmark::test_case
-{
-public:
-    uint32_t size_;
-    std::vector<uint8_t> array_;
-    test3d(mapnik::parameters const& params)
-     : test_case(params),
-       size_(*params.get<mapnik::value_integer>("size",256*256)),
-       array_(size_,0) { }
-    bool validate() const
-    {
-        return true;
-    }
-    bool operator()() const
-    {
-         for (std::size_t i=0;i<iterations_;++i) {
-             std::deque<uint8_t> data(size_);
-             for (std::size_t i=0;i<size_;++i) {
-                 if (data[i] != 0) {
-                     throw std::runtime_error("found non zero value");
-                 }
-             }
-         }
-         return true;
-    }
-};
-
 class test4 : public benchmark::test_case
 {
 public:
diff --git a/benchmark/test_png_encoding1.cpp b/benchmark/test_png_encoding1.cpp
index 55d3f18af..ec98f2884 100644
--- a/benchmark/test_png_encoding1.cpp
+++ b/benchmark/test_png_encoding1.cpp
@@ -19,8 +19,8 @@ public:
             out.clear();
             out = mapnik::save_to_string(im_,"png8:m=h:z=1");
         }
+        return true;
     }
-    return true;
 };
 
 BENCHMARK(test,"encoding blank png")
diff --git a/benchmark/test_png_encoding2.cpp b/benchmark/test_png_encoding2.cpp
index 640050c0d..910a9ac95 100644
--- a/benchmark/test_png_encoding2.cpp
+++ b/benchmark/test_png_encoding2.cpp
@@ -30,8 +30,8 @@ public:
             out.clear();
             out = mapnik::save_to_string(*im_,"png8:m=h:z=1");
         }
+        return true;
     }
-    return true;
 };
 
 BENCHMARK(test,"encoding multicolor png")