diff --git a/benchmark/test_polygon_clipping.cpp b/benchmark/test_polygon_clipping.cpp
index 0c0639f6e..60687c056 100644
--- a/benchmark/test_polygon_clipping.cpp
+++ b/benchmark/test_polygon_clipping.cpp
@@ -115,9 +115,10 @@ public:
         {
             throw std::runtime_error("Failed to parse WKT");
         }
-        unsigned count = 0;
+        bool valid = true;
         for (unsigned i=0;i<iterations_;++i)
         {
+            unsigned count = 0;
             for (mapnik::geometry_type const& geom : paths)
             {
                 mapnik::vertex_adapter va(geom);
@@ -133,12 +134,11 @@ public:
                     count++;
                 }
             }
-        }
-        // TODO - sometimes this is 310001: what is causing that?
-        unsigned expected_count = 310002;
-        bool valid = (count == expected_count);
-        if (!valid) {
-            std::clog << "test1: clipping failed: processed " << count << " verticies but expected " << expected_count << "\n";
+            unsigned expected_count = 31;
+            if (count != expected_count) {
+                std::clog << "test1: clipping failed: processed " << count << " verticies but expected " << expected_count << "\n";
+                valid = false;
+            }
         }
         return valid;
     }
@@ -215,9 +215,10 @@ public:
         ps.line_to(extent_.maxx(), extent_.maxy());
         ps.line_to(extent_.maxx(), extent_.miny());
         ps.close_polygon();
-        unsigned count = 0;
+        bool valid = true;
         for (unsigned i=0;i<iterations_;++i)
         {
+            unsigned count = 0;
             for (mapnik::geometry_type const& geom : paths)
             {
                 mapnik::vertex_adapter va(geom);
@@ -233,11 +234,11 @@ public:
                     count++;
                 }
             }
-        }
-        unsigned expected_count = 290000;
-        bool valid = (count == expected_count);
-        if (!valid) {
-            std::clog << "test2: clipping failed: processed " << count << " verticies but expected " << expected_count << "\n";
+            unsigned expected_count = 29;
+            if (count != expected_count) {
+                std::clog << "test1: clipping failed: processed " << count << " verticies but expected " << expected_count << "\n";
+                valid = false;
+            }
         }
         return valid;
     }
@@ -297,9 +298,10 @@ public:
         {
             throw std::runtime_error("Failed to parse WKT");
         }
-        unsigned count = 0;
+        bool valid = true;
         for (unsigned i=0;i<iterations_;++i)
         {
+            unsigned count = 0;
             for ( mapnik::geometry_type const& geom : paths)
             {
                 mapnik::vertex_adapter va(geom);
@@ -310,11 +312,11 @@ public:
                     count++;
                 }
             }
-        }
-        unsigned expected_count = 310000;
-        bool valid = (count == expected_count);
-        if (!valid) {
-            std::clog << "test3: clipping failed: processed " << count << " verticies but expected " << expected_count << "\n";
+            unsigned expected_count = 31;
+            if (count != expected_count) {
+                std::clog << "test1: clipping failed: processed " << count << " verticies but expected " << expected_count << "\n";
+                valid = false;
+            }
         }
         return valid;
     }