diff --git a/include/PolyVox/FilePager.h b/include/PolyVox/FilePager.h
index 04eb3b04..60a4cba7 100644
--- a/include/PolyVox/FilePager.h
+++ b/include/PolyVox/FilePager.h
@@ -56,13 +56,12 @@ namespace PolyVox
 					m_strFolderName.append("/");
 			}
 
-			// Build a unique prefix to avoid multiple pagers using the same filenames.
-			srand(static_cast<unsigned int>(time(0)));
-			int iRandomValue = rand();
-
+			// Build a unique postfix to avoid filename conflicts between multiple pagers/runs.
+			// Not a very robust solution but this class is meant as an example for testing really.
 			std::stringstream ss;
-			ss << std::hex << iRandomValue;
-			m_strRandomPrefix = ss.str();
+			ss << time(0) << "--"; // Avoid multiple runs using the same filenames.
+			ss << this; // Avoid multiple FilePagers using the same filenames.
+			m_strPostfix = ss.str();
 		}
 
 		/// Destructor
@@ -82,9 +81,10 @@ namespace PolyVox
 			POLYVOX_ASSERT(pChunk->getData(), "Chunk must have valid data");
 
 			std::stringstream ssFilename;
-			ssFilename << m_strFolderName << "/" << m_strRandomPrefix << "-"
+			ssFilename << m_strFolderName << "/"
 				<< region.getLowerX() << "_" << region.getLowerY() << "_" << region.getLowerZ() << "_"
-				 << region.getUpperX() << "_" << region.getUpperY() << "_" << region.getUpperZ();
+				 << region.getUpperX() << "_" << region.getUpperY() << "_" << region.getUpperZ()
+				 << "--" << m_strPostfix;
 
 			std::string filename = ssFilename.str();
 
@@ -133,9 +133,10 @@ namespace PolyVox
 			POLYVOX_LOG_TRACE("Paging out data for " << region);
 
 			std::stringstream ssFilename;
-			ssFilename << m_strFolderName << "/" << m_strRandomPrefix << "-"
+			ssFilename << m_strFolderName << "/"
 				<< region.getLowerX() << "_" << region.getLowerY() << "_" << region.getLowerZ() << "_"
-				 << region.getUpperX() << "_" << region.getUpperY() << "_" << region.getUpperZ();
+				<< region.getUpperX() << "_" << region.getUpperY() << "_" << region.getUpperZ()
+				<< "--" << m_strPostfix;
 
 			std::string filename = ssFilename.str();
 
@@ -163,7 +164,7 @@ namespace PolyVox
 
 	protected:
 		std::string m_strFolderName;
-		std::string m_strRandomPrefix;
+		std::string m_strPostfix;
 
 		std::vector<std::string> m_vecCreatedFiles;
 	};
diff --git a/tests/testvolume.cpp b/tests/testvolume.cpp
index d17d4e4b..a35cdaa6 100644
--- a/tests/testvolume.cpp
+++ b/tests/testvolume.cpp
@@ -225,7 +225,7 @@ int32_t testDirectRandomAccess(const VolumeType* volume)
 	std::mt19937 rng;
 	int32_t result = 0;
 
-	for (uint32_t ct = 0; ct < 10000; ct++)
+	for (uint32_t ct = 0; ct < 1000000; ct++)
 	{
 		uint32_t rand = rng();
 
@@ -258,10 +258,12 @@ TestVolume::TestVolume()
 	m_regExternal.shiftUpperCorner(2, 5, 4);
 
 	m_pFilePager = new FilePager<int32_t>(".");
+	m_pFilePagerHighMem = new FilePager<int32_t>(".");
 
 	//Create the volumes
 	m_pRawVolume = new RawVolume<int32_t>(m_regVolume);
 	m_pPagedVolume = new PagedVolume<int32_t>(m_pFilePager, 1 * 1024 * 1024, m_uChunkSideLength);
+	m_pPagedVolumeHighMem = new PagedVolume<int32_t>(m_pFilePagerHighMem, 256 * 1024 * 1024, m_uChunkSideLength);
 
 	//Fill the volume with some data
 	for (int z = m_regVolume.getLowerZ(); z <= m_regVolume.getUpperZ(); z++)
@@ -273,11 +275,11 @@ TestVolume::TestVolume()
 				int32_t value = x + y + z;
 				m_pRawVolume->setVoxel(x, y, z, value);
 				m_pPagedVolume->setVoxel(x, y, z, value);
+				m_pPagedVolumeHighMem->setVoxel(x, y, z, value);
 			}
 		}
 	}
 
-	// Note - We are reusing the FilePager for testing... watch out for conflicts with the main volume.
 	m_pPagedVolumeChunk = new PagedVolume<uint32_t>::Chunk(Vector3DInt32(10000, 10000, 10000), m_uChunkSideLength, nullptr);
 	std::mt19937 rng;
 	for (uint16_t z = 0; z < m_uChunkSideLength; z++)
@@ -488,7 +490,7 @@ void TestVolume::testRawVolumeDirectRandomAccess()
 	{
 		result = testDirectRandomAccess(m_pRawVolume);
 	}
-	QCOMPARE(result, static_cast<int32_t>(805464457));
+	QCOMPARE(result, static_cast<int32_t>(267192737));
 }
 
 void TestVolume::testPagedVolumeDirectRandomAccess()
@@ -496,9 +498,9 @@ void TestVolume::testPagedVolumeDirectRandomAccess()
 	int32_t result = 0;
 	QBENCHMARK
 	{
-		result = testDirectRandomAccess(m_pPagedVolume);
+		result = testDirectRandomAccess(m_pPagedVolumeHighMem);
 	}
-	QCOMPARE(result, static_cast<int32_t>(805464457));
+	QCOMPARE(result, static_cast<int32_t>(267192737));
 }
 
 int32_t TestVolume::testPagedVolumeChunkAccess(uint16_t localityMask)
diff --git a/tests/testvolume.h b/tests/testvolume.h
index a7645977..624c155c 100644
--- a/tests/testvolume.h
+++ b/tests/testvolume.h
@@ -72,6 +72,7 @@ private:
 	PolyVox::Region m_regInternal;
 	PolyVox::Region m_regExternal;
 	PolyVox::FilePager<int32_t>* m_pFilePager;
+	PolyVox::FilePager<int32_t>* m_pFilePagerHighMem;
 
 	PolyVox::RawVolume<int32_t>* m_pRawVolume;
 	PolyVox::PagedVolume<int32_t>* m_pPagedVolume;