diff --git a/include/benchmark/benchmark.h b/include/benchmark/benchmark.h
index 04fbbf4..ea9743c 100644
--- a/include/benchmark/benchmark.h
+++ b/include/benchmark/benchmark.h
@@ -514,10 +514,10 @@
   //
   // REQUIRES: a benchmark has exited its benchmarking loop.
   BENCHMARK_ALWAYS_INLINE
-  void SetBytesProcessed(size_t bytes) { bytes_processed_ = bytes; }
+  void SetBytesProcessed(int64_t bytes) { bytes_processed_ = bytes; }
 
   BENCHMARK_ALWAYS_INLINE
-  size_t bytes_processed() const { return bytes_processed_; }
+  int64_t bytes_processed() const { return bytes_processed_; }
 
   // If this routine is called with complexity_n > 0 and complexity report is
   // requested for the
@@ -525,10 +525,10 @@
   // and complexity_n will
   // represent the length of N.
   BENCHMARK_ALWAYS_INLINE
-  void SetComplexityN(int complexity_n) { complexity_n_ = complexity_n; }
+  void SetComplexityN(int64_t complexity_n) { complexity_n_ = complexity_n; }
 
   BENCHMARK_ALWAYS_INLINE
-  int complexity_length_n() { return complexity_n_; }
+  int64_t complexity_length_n() { return complexity_n_; }
 
   // If this routine is called with items > 0, then an items/s
   // label is printed on the benchmark report line for the currently
@@ -537,10 +537,10 @@
   //
   // REQUIRES: a benchmark has exited its benchmarking loop.
   BENCHMARK_ALWAYS_INLINE
-  void SetItemsProcessed(size_t items) { items_processed_ = items; }
+  void SetItemsProcessed(int64_t items) { items_processed_ = items; }
 
   BENCHMARK_ALWAYS_INLINE
-  size_t items_processed() const { return items_processed_; }
+  int64_t items_processed() const { return items_processed_; }
 
   // If this routine is called, the specified label is printed at the
   // end of the benchmark report line for the currently executing
@@ -562,16 +562,16 @@
 
   // Range arguments for this run. CHECKs if the argument has been set.
   BENCHMARK_ALWAYS_INLINE
-  int range(std::size_t pos = 0) const {
+  int64_t range(std::size_t pos = 0) const {
     assert(range_.size() > pos);
     return range_[pos];
   }
 
   BENCHMARK_DEPRECATED_MSG("use 'range(0)' instead")
-  int range_x() const { return range(0); }
+  int64_t range_x() const { return range(0); }
 
   BENCHMARK_DEPRECATED_MSG("use 'range(1)' instead")
-  int range_y() const { return range(1); }
+  int64_t range_y() const { return range(1); }
 
   BENCHMARK_ALWAYS_INLINE
   size_t iterations() const {
@@ -598,12 +598,12 @@
   bool error_occurred_;
 
 private: // items we don't need on the first cache line
-  std::vector<int> range_;
+  std::vector<int64_t> range_;
 
-  size_t bytes_processed_;
-  size_t items_processed_;
+  int64_t bytes_processed_;
+  int64_t items_processed_;
 
-  int complexity_n_;
+  int64_t complexity_n_;
 
  public:
   // Container for user-defined counters.
@@ -615,7 +615,7 @@
 
 
   // TODO(EricWF) make me private
-  State(size_t max_iters, const std::vector<int>& ranges, int thread_i,
+  State(size_t max_iters, const std::vector<int64_t>& ranges, int thread_i,
         int n_threads, internal::ThreadTimer* timer,
         internal::ThreadManager* manager);
 
@@ -736,7 +736,7 @@
   // Run this benchmark once with "x" as the extra argument passed
   // to the function.
   // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* Arg(int x);
+  Benchmark* Arg(int64_t x);
 
   // Run this benchmark with the given time unit for the generated output report
   Benchmark* Unit(TimeUnit unit);
@@ -744,23 +744,23 @@
   // Run this benchmark once for a number of values picked from the
   // range [start..limit].  (start and limit are always picked.)
   // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* Range(int start, int limit);
+  Benchmark* Range(int64_t start, int64_t limit);
 
   // Run this benchmark once for all values in the range [start..limit] with
   // specific step
   // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* DenseRange(int start, int limit, int step = 1);
+  Benchmark* DenseRange(int64_t start, int64_t limit, int step = 1);
 
   // Run this benchmark once with "args" as the extra arguments passed
   // to the function.
   // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* Args(const std::vector<int>& args);
+  Benchmark* Args(const std::vector<int64_t>& args);
 
   // Equivalent to Args({x, y})
   // NOTE: This is a legacy C++03 interface provided for compatibility only.
   //   New code should use 'Args'.
-  Benchmark* ArgPair(int x, int y) {
-    std::vector<int> args;
+  Benchmark* ArgPair(int64_t x, int64_t y) {
+    std::vector<int64_t> args;
     args.push_back(x);
     args.push_back(y);
     return Args(args);
@@ -769,7 +769,7 @@
   // Run this benchmark once for a number of values picked from the
   // ranges [start..limit].  (starts and limits are always picked.)
   // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* Ranges(const std::vector<std::pair<int, int> >& ranges);
+  Benchmark* Ranges(const std::vector<std::pair<int64_t, int64_t> >& ranges);
 
   // Equivalent to ArgNames({name})
   Benchmark* ArgName(const std::string& name);
@@ -781,8 +781,8 @@
   // Equivalent to Ranges({{lo1, hi1}, {lo2, hi2}}).
   // NOTE: This is a legacy C++03 interface provided for compatibility only.
   //   New code should use 'Ranges'.
-  Benchmark* RangePair(int lo1, int hi1, int lo2, int hi2) {
-    std::vector<std::pair<int, int> > ranges;
+  Benchmark* RangePair(int64_t lo1, int64_t hi1, int64_t lo2, int64_t hi2) {
+    std::vector<std::pair<int64_t, int64_t> > ranges;
     ranges.push_back(std::make_pair(lo1, hi1));
     ranges.push_back(std::make_pair(lo2, hi2));
     return Ranges(ranges);
@@ -889,15 +889,13 @@
 
   int ArgsCnt() const;
 
-  static void AddRange(std::vector<int>* dst, int lo, int hi, int mult);
-
  private:
   friend class BenchmarkFamilies;
 
   std::string name_;
   ReportMode report_mode_;
   std::vector<std::string> arg_names_;   // Args for all benchmark runs
-  std::vector<std::vector<int> > args_;  // Args for all benchmark runs
+  std::vector<std::vector<int64_t> > args_;  // Args for all benchmark runs
   TimeUnit time_unit_;
   int range_multiplier_;
   double min_time_;
diff --git a/src/benchmark.cc b/src/benchmark.cc
index 356ed54..7b0d113 100644
--- a/src/benchmark.cc
+++ b/src/benchmark.cc
@@ -290,7 +290,7 @@
 }  // namespace
 }  // namespace internal
 
-State::State(size_t max_iters, const std::vector<int>& ranges, int thread_i,
+State::State(size_t max_iters, const std::vector<int64_t>& ranges, int thread_i,
              int n_threads, internal::ThreadTimer* timer,
              internal::ThreadManager* manager)
     : total_iterations_(0),
diff --git a/src/benchmark_api_internal.h b/src/benchmark_api_internal.h
index d481dc5..dd7a3ff 100644
--- a/src/benchmark_api_internal.h
+++ b/src/benchmark_api_internal.h
@@ -17,7 +17,7 @@
   std::string name;
   Benchmark* benchmark;
   ReportMode report_mode;
-  std::vector<int> arg;
+  std::vector<int64_t> arg;
   TimeUnit time_unit;
   int range_multiplier;
   bool use_real_time;
diff --git a/src/benchmark_register.cc b/src/benchmark_register.cc
index 59b3e4d..4fea6d9 100644
--- a/src/benchmark_register.cc
+++ b/src/benchmark_register.cc
@@ -12,9 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "internal_macros.h"
+#include "benchmark_register.h"
 
 #ifndef BENCHMARK_OS_WINDOWS
 #ifndef BENCHMARK_OS_FUCHSIA
@@ -36,13 +34,16 @@
 #include <sstream>
 #include <thread>
 
+#include "benchmark/benchmark.h"
+#include "benchmark_api_internal.h"
 #include "check.h"
 #include "commandlineflags.h"
 #include "complexity.h"
-#include "statistics.h"
+#include "internal_macros.h"
 #include "log.h"
 #include "mutex.h"
 #include "re.h"
+#include "statistics.h"
 #include "string_util.h"
 #include "timers.h"
 
@@ -175,7 +176,7 @@
                   StrFormat("%s:", family->arg_names_[arg_i].c_str());
             }
           }
-          
+
           instance.name += StrFormat("%d", arg);
           ++arg_i;
         }
@@ -246,30 +247,7 @@
 
 Benchmark::~Benchmark() {}
 
-void Benchmark::AddRange(std::vector<int>* dst, int lo, int hi, int mult) {
-  CHECK_GE(lo, 0);
-  CHECK_GE(hi, lo);
-  CHECK_GE(mult, 2);
-
-  // Add "lo"
-  dst->push_back(lo);
-
-  static const int kint32max = std::numeric_limits<int32_t>::max();
-
-  // Now space out the benchmarks in multiples of "mult"
-  for (int32_t i = 1; i < kint32max / mult; i *= mult) {
-    if (i >= hi) break;
-    if (i > lo) {
-      dst->push_back(i);
-    }
-  }
-  // Add "hi" (if different from "lo")
-  if (hi != lo) {
-    dst->push_back(hi);
-  }
-}
-
-Benchmark* Benchmark::Arg(int x) {
+Benchmark* Benchmark::Arg(int64_t x) {
   CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
   args_.push_back({x});
   return this;
@@ -280,20 +258,21 @@
   return this;
 }
 
-Benchmark* Benchmark::Range(int start, int limit) {
+Benchmark* Benchmark::Range(int64_t start, int64_t limit) {
   CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  std::vector<int> arglist;
+  std::vector<int64_t> arglist;
   AddRange(&arglist, start, limit, range_multiplier_);
 
-  for (int i : arglist) {
+  for (int64_t i : arglist) {
     args_.push_back({i});
   }
   return this;
 }
 
-Benchmark* Benchmark::Ranges(const std::vector<std::pair<int, int>>& ranges) {
+Benchmark* Benchmark::Ranges(
+    const std::vector<std::pair<int64_t, int64_t>>& ranges) {
   CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(ranges.size()));
-  std::vector<std::vector<int>> arglists(ranges.size());
+  std::vector<std::vector<int64_t>> arglists(ranges.size());
   std::size_t total = 1;
   for (std::size_t i = 0; i < ranges.size(); i++) {
     AddRange(&arglists[i], ranges[i].first, ranges[i].second,
@@ -304,7 +283,7 @@
   std::vector<std::size_t> ctr(arglists.size(), 0);
 
   for (std::size_t i = 0; i < total; i++) {
-    std::vector<int> tmp;
+    std::vector<int64_t> tmp;
     tmp.reserve(arglists.size());
 
     for (std::size_t j = 0; j < arglists.size(); j++) {
@@ -336,17 +315,17 @@
   return this;
 }
 
-Benchmark* Benchmark::DenseRange(int start, int limit, int step) {
+Benchmark* Benchmark::DenseRange(int64_t start, int64_t limit, int step) {
   CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
   CHECK_GE(start, 0);
   CHECK_LE(start, limit);
-  for (int arg = start; arg <= limit; arg += step) {
+  for (int64_t arg = start; arg <= limit; arg += step) {
     args_.push_back({arg});
   }
   return this;
 }
 
-Benchmark* Benchmark::Args(const std::vector<int>& args) {
+Benchmark* Benchmark::Args(const std::vector<int64_t>& args) {
   CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(args.size()));
   args_.push_back(args);
   return this;
@@ -363,7 +342,6 @@
   return this;
 }
 
-
 Benchmark* Benchmark::MinTime(double t) {
   CHECK(t > 0.0);
   CHECK(iterations_ == 0);
@@ -371,7 +349,6 @@
   return this;
 }
 
-
 Benchmark* Benchmark::Iterations(size_t n) {
   CHECK(n > 0);
   CHECK(IsZero(min_time_));
diff --git a/src/benchmark_register.h b/src/benchmark_register.h
new file mode 100644
index 0000000..0705e21
--- /dev/null
+++ b/src/benchmark_register.h
@@ -0,0 +1,33 @@
+#ifndef BENCHMARK_REGISTER_H
+#define BENCHMARK_REGISTER_H
+
+#include <vector>
+
+#include "check.h"
+
+template <typename T>
+void AddRange(std::vector<T>* dst, T lo, T hi, int mult) {
+  CHECK_GE(lo, 0);
+  CHECK_GE(hi, lo);
+  CHECK_GE(mult, 2);
+
+  // Add "lo"
+  dst->push_back(lo);
+
+  static const T kmax = std::numeric_limits<T>::max();
+
+  // Now space out the benchmarks in multiples of "mult"
+  for (T i = 1; i < kmax / mult; i *= mult) {
+    if (i >= hi) break;
+    if (i > lo) {
+      dst->push_back(i);
+    }
+  }
+
+  // Add "hi" (if different from "lo")
+  if (hi != lo) {
+    dst->push_back(hi);
+  }
+}
+
+#endif  // BENCHMARK_REGISTER_H
diff --git a/test/BUILD b/test/BUILD
index dfca7db..2b3a391 100644
--- a/test/BUILD
+++ b/test/BUILD
@@ -1,15 +1,28 @@
-NEEDS_GTEST_MAIN = [
-    "statistics_test.cc",
-]
-
 TEST_COPTS = [
     "-pedantic",
     "-pedantic-errors",
     "-std=c++11",
+    "-Wall",
+    "-Wextra",
+    "-Wshadow",
+#    "-Wshorten-64-to-32",
+    "-Wfloat-equal",
+    "-fstrict-aliasing",
 ]
 
+PER_SRC_COPTS = ({
+    "cxx03_test.cc": ["-std=c++03"],
+    # Some of the issues with DoNotOptimize only occur when optimization is enabled
+    "donotoptimize_test.cc": ["-O3"],
+})
+
+
 TEST_ARGS = ["--benchmark_min_time=0.01"]
 
+PER_SRC_TEST_ARGS = ({
+    "user_counters_tabular_test.cc": ["--benchmark_counters_tabular=true"],
+})
+
 cc_library(
     name = "output_test_helper",
     testonly = 1,
@@ -22,27 +35,23 @@
     ],
 )
 
-[cc_test(
+[
+  cc_test(
     name = test_src[:-len(".cc")],
     size = "small",
     srcs = [test_src],
-    args = TEST_ARGS + ({
-        "user_counters_tabular_test.cc": ["--benchmark_counters_tabular=true"],
-    }).get(test_src, []),
-    copts = TEST_COPTS + ({
-        "cxx03_test.cc": ["-std=c++03"],
-        # Some of the issues with DoNotOptimize only occur when optimization is enabled
-        "donotoptimize_test.cc": ["-O3"],
-    }).get(test_src, []),
+    args = TEST_ARGS + PER_SRC_TEST_ARGS.get(test_src, []),
+    copts = TEST_COPTS + PER_SRC_COPTS.get(test_src, []),
     deps = [
         ":output_test_helper",
         "//:benchmark",
         "//:benchmark_internal_headers",
         "@com_google_googletest//:gtest",
     ] + (
-        ["@com_google_googletest//:gtest_main"] if (test_src in NEEDS_GTEST_MAIN) else []
+        ["@com_google_googletest//:gtest_main"] if (test_src[-len("gtest.cc"):] == "gtest.cc") else []
     ),
-# FIXME: Add support for assembly tests to bazel.
-# See Issue #556
-# https://github.com/google/benchmark/issues/556
-) for test_src in glob(["*_test.cc"], exclude = ["*_assembly_test.cc"])]
+  # FIXME: Add support for assembly tests to bazel.
+  # See Issue #556
+  # https://github.com/google/benchmark/issues/556
+  ) for test_src in glob(["*test.cc"], exclude = ["*_assembly_test.cc"])
+]
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 7c6366f..63c0e58 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -162,7 +162,8 @@
     add_test(${name} ${name})
   endmacro()
 
-  add_gtest(statistics_test)
+  add_gtest(benchmark_gtest)
+  add_gtest(statistics_gtest)
 endif(BENCHMARK_ENABLE_GTEST_TESTS)
 
 ###############################################################################
diff --git a/test/benchmark_gtest.cc b/test/benchmark_gtest.cc
new file mode 100644
index 0000000..10683b4
--- /dev/null
+++ b/test/benchmark_gtest.cc
@@ -0,0 +1,33 @@
+#include <vector>
+
+#include "../src/benchmark_register.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+TEST(AddRangeTest, Simple) {
+  std::vector<int> dst;
+  AddRange(&dst, 1, 2, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
+}
+
+TEST(AddRangeTest, Simple64) {
+  std::vector<int64_t> dst;
+  AddRange(&dst, static_cast<int64_t>(1), static_cast<int64_t>(2), 2);
+  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
+}
+
+TEST(AddRangeTest, Advanced) {
+  std::vector<int> dst;
+  AddRange(&dst, 5, 15, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
+}
+
+TEST(AddRangeTest, Advanced64) {
+  std::vector<int64_t> dst;
+  AddRange(&dst, static_cast<int64_t>(5), static_cast<int64_t>(15), 2);
+  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
+}
+
+}  // end namespace
diff --git a/test/benchmark_test.cc b/test/benchmark_test.cc
index 78802c8..3cd4f55 100644
--- a/test/benchmark_test.cc
+++ b/test/benchmark_test.cc
@@ -40,8 +40,8 @@
   return (pi - 1.0) * 4;
 }
 
-std::set<int> ConstructRandomSet(int size) {
-  std::set<int> s;
+std::set<int64_t> ConstructRandomSet(int64_t size) {
+  std::set<int64_t> s;
   for (int i = 0; i < size; ++i) s.insert(s.end(), i);
   return s;
 }
@@ -64,7 +64,7 @@
 
 static void BM_CalculatePiRange(benchmark::State& state) {
   double pi = 0.0;
-  for (auto _ : state) pi = CalculatePi(state.range(0));
+  for (auto _ : state) pi = CalculatePi(static_cast<int>(state.range(0)));
   std::stringstream ss;
   ss << pi;
   state.SetLabel(ss.str());
@@ -74,7 +74,7 @@
 static void BM_CalculatePi(benchmark::State& state) {
   static const int depth = 1024;
   for (auto _ : state) {
-    benchmark::DoNotOptimize(CalculatePi(depth));
+    benchmark::DoNotOptimize(CalculatePi(static_cast<int>(depth)));
   }
 }
 BENCHMARK(BM_CalculatePi)->Threads(8);
@@ -82,7 +82,7 @@
 BENCHMARK(BM_CalculatePi)->ThreadPerCpu();
 
 static void BM_SetInsert(benchmark::State& state) {
-  std::set<int> data;
+  std::set<int64_t> data;
   for (auto _ : state) {
     state.PauseTiming();
     data = ConstructRandomSet(state.range(0));
@@ -103,9 +103,9 @@
   ValueType v = 42;
   for (auto _ : state) {
     Container c;
-    for (int i = state.range(0); --i;) c.push_back(v);
+    for (int64_t i = state.range(0); --i;) c.push_back(v);
   }
-  const size_t items_processed = state.iterations() * state.range(0);
+  const int64_t items_processed = state.iterations() * state.range(0);
   state.SetItemsProcessed(items_processed);
   state.SetBytesProcessed(items_processed * sizeof(v));
 }
@@ -118,8 +118,9 @@
 #endif
 
 static void BM_StringCompare(benchmark::State& state) {
-  std::string s1(state.range(0), '-');
-  std::string s2(state.range(0), '-');
+  size_t len = static_cast<size_t>(state.range(0));
+  std::string s1(len, '-');
+  std::string s2(len, '-');
   for (auto _ : state) benchmark::DoNotOptimize(s1.compare(s2));
 }
 BENCHMARK(BM_StringCompare)->Range(1, 1 << 20);
@@ -154,13 +155,13 @@
 BENCHMARK(BM_LongTest)->Range(1 << 16, 1 << 28);
 
 static void BM_ParallelMemset(benchmark::State& state) {
-  int size = state.range(0) / static_cast<int>(sizeof(int));
-  int thread_size = size / state.threads;
+  int64_t size = state.range(0) / static_cast<int64_t>(sizeof(int));
+  int thread_size = static_cast<int>(size) / state.threads;
   int from = thread_size * state.thread_index;
   int to = from + thread_size;
 
   if (state.thread_index == 0) {
-    test_vector = new std::vector<int>(size);
+    test_vector = new std::vector<int>(static_cast<size_t>(size));
   }
 
   for (auto _ : state) {
@@ -178,8 +179,8 @@
 BENCHMARK(BM_ParallelMemset)->Arg(10 << 20)->ThreadRange(1, 4);
 
 static void BM_ManualTiming(benchmark::State& state) {
-  size_t slept_for = 0;
-  int microseconds = state.range(0);
+  int64_t slept_for = 0;
+  int64_t microseconds = state.range(0);
   std::chrono::duration<double, std::micro> sleep_duration{
       static_cast<double>(microseconds)};
 
diff --git a/test/complexity_test.cc b/test/complexity_test.cc
index 89dfa58..aa35619 100644
--- a/test/complexity_test.cc
+++ b/test/complexity_test.cc
@@ -81,9 +81,9 @@
 // --------------------------- Testing BigO O(N) --------------------------- //
 // ========================================================================= //
 
-std::vector<int> ConstructRandomVector(int size) {
+std::vector<int> ConstructRandomVector(int64_t size) {
   std::vector<int> v;
-  v.reserve(size);
+  v.reserve(static_cast<int>(size));
   for (int i = 0; i < size; ++i) {
     v.push_back(std::rand() % size);
   }
@@ -92,8 +92,8 @@
 
 void BM_Complexity_O_N(benchmark::State& state) {
   auto v = ConstructRandomVector(state.range(0));
-  const int item_not_in_vector =
-      state.range(0) * 2;  // Test worst case scenario (item not in vector)
+  // Test worst case scenario (item not in vector)
+  const int64_t item_not_in_vector = state.range(0) * 2;
   for (auto _ : state) {
     benchmark::DoNotOptimize(std::find(v.begin(), v.end(), item_not_in_vector));
   }
diff --git a/test/map_test.cc b/test/map_test.cc
index 311d2d2..dbf7982 100644
--- a/test/map_test.cc
+++ b/test/map_test.cc
@@ -8,7 +8,7 @@
 std::map<int, int> ConstructRandomMap(int size) {
   std::map<int, int> m;
   for (int i = 0; i < size; ++i) {
-    m.insert(std::make_pair(rand() % size, rand() % size));
+    m.insert(std::make_pair(std::rand() % size, std::rand() % size));
   }
   return m;
 }
@@ -17,14 +17,14 @@
 
 // Basic version.
 static void BM_MapLookup(benchmark::State& state) {
-  const int size = state.range(0);
+  const int size = static_cast<int>(state.range(0));
   std::map<int, int> m;
   for (auto _ : state) {
     state.PauseTiming();
     m = ConstructRandomMap(size);
     state.ResumeTiming();
     for (int i = 0; i < size; ++i) {
-      benchmark::DoNotOptimize(m.find(rand() % size));
+      benchmark::DoNotOptimize(m.find(std::rand() % size));
     }
   }
   state.SetItemsProcessed(state.iterations() * size);
@@ -35,7 +35,7 @@
 class MapFixture : public ::benchmark::Fixture {
  public:
   void SetUp(const ::benchmark::State& st) {
-    m = ConstructRandomMap(st.range(0));
+    m = ConstructRandomMap(static_cast<int>(st.range(0)));
   }
 
   void TearDown(const ::benchmark::State&) { m.clear(); }
@@ -44,10 +44,10 @@
 };
 
 BENCHMARK_DEFINE_F(MapFixture, Lookup)(benchmark::State& state) {
-  const int size = state.range(0);
+  const int size = static_cast<int>(state.range(0));
   for (auto _ : state) {
     for (int i = 0; i < size; ++i) {
-      benchmark::DoNotOptimize(m.find(rand() % size));
+      benchmark::DoNotOptimize(m.find(std::rand() % size));
     }
   }
   state.SetItemsProcessed(state.iterations() * size);
diff --git a/test/multiple_ranges_test.cc b/test/multiple_ranges_test.cc
index 0a82382..c64acab 100644
--- a/test/multiple_ranges_test.cc
+++ b/test/multiple_ranges_test.cc
@@ -1,7 +1,9 @@
 #include "benchmark/benchmark.h"
 
 #include <cassert>
+#include <iostream>
 #include <set>
+#include <vector>
 
 class MultipleRangesFixture : public ::benchmark::Fixture {
  public:
@@ -27,25 +29,46 @@
                         {7, 6, 3}}) {}
 
   void SetUp(const ::benchmark::State& state) {
-    std::vector<int> ranges = {state.range(0), state.range(1), state.range(2)};
+    std::vector<int64_t> ranges = {state.range(0), state.range(1),
+                                   state.range(2)};
 
     assert(expectedValues.find(ranges) != expectedValues.end());
 
     actualValues.insert(ranges);
   }
 
+  // NOTE: This is not TearDown as we want to check after _all_ runs are
+  // complete.
   virtual ~MultipleRangesFixture() {
     assert(actualValues.size() == expectedValues.size());
+    if (actualValues.size() != expectedValues.size()) {
+      std::cout << "EXPECTED\n";
+      for (auto v : expectedValues) {
+        std::cout << "{";
+        for (int64_t iv : v) {
+          std::cout << iv << ", ";
+        }
+        std::cout << "}\n";
+      }
+      std::cout << "ACTUAL\n";
+      for (auto v : actualValues) {
+        std::cout << "{";
+        for (int64_t iv : v) {
+          std::cout << iv << ", ";
+        }
+        std::cout << "}\n";
+      }
+    }
   }
 
-  std::set<std::vector<int>> expectedValues;
-  std::set<std::vector<int>> actualValues;
+  std::set<std::vector<int64_t>> expectedValues;
+  std::set<std::vector<int64_t>> actualValues;
 };
 
 BENCHMARK_DEFINE_F(MultipleRangesFixture, Empty)(benchmark::State& state) {
   for (auto _ : state) {
-    int product = state.range(0) * state.range(1) * state.range(2);
-    for (int x = 0; x < product; x++) {
+    int64_t product = state.range(0) * state.range(1) * state.range(2);
+    for (int64_t x = 0; x < product; x++) {
       benchmark::DoNotOptimize(x);
     }
   }
diff --git a/test/statistics_test.cc b/test/statistics_gtest.cc
similarity index 100%
rename from test/statistics_test.cc
rename to test/statistics_gtest.cc