diff --git a/ortools/base/accurate_sum_test.cc b/ortools/base/accurate_sum_test.cc
deleted file mode 100644
index 830eca4c23..0000000000
--- a/ortools/base/accurate_sum_test.cc
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2010-2025 Google LLC
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "ortools/base/accurate_sum.h"
-
-#include <cmath>
-#include <random>
-#include <vector>
-
-#include "absl/random/random.h"
-#include "gtest/gtest.h"
-#include "ortools/base/accurate_sum.h"
-
-namespace {
-
-TEST(AccurateSumTest, ExactConsistencyWithUtilMath) {
-  std::vector<double> data;
-  {
-    std::mt19937 random(12345);
-    const int kNumNumbers = 1000000;
-    data.assign(kNumNumbers, 0.0);
-    for (int i = 0; i < kNumNumbers; ++i) {
-      const double abs_value = exp2(absl::Uniform<double>(random, -100, 100.0));
-      data[i] = absl::Bernoulli(random, 1.0 / 2) ? abs_value : -abs_value;
-    }
-  }
-  operations_research::AccurateSum<double> forked_sum;
-  AccurateSum<double> reference_sum;
-  // Runtime: August 2013, fastbuild, forge: 4 seconds.
-  const int kNumPasses = 100;
-  for (int i = 0; i < kNumPasses; ++i) {
-    for (const double v : data) {
-      forked_sum.Add(v);
-      reference_sum.Add(v);
-    }
-  }
-  // We *do* mean to expect a rigorous floating-point equality.
-  EXPECT_EQ(reference_sum.Value(), forked_sum.Value());
-}
-
-}  // namespace
diff --git a/ortools/base/linked_hash_map_test.cc b/ortools/base/linked_hash_map_test.cc
deleted file mode 100644
index 28b50c727c..0000000000
--- a/ortools/base/linked_hash_map_test.cc
+++ /dev/null
@@ -1,732 +0,0 @@
-// Copyright 2010-2025 Google LLC
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Tests linked_hash_map.
-//
-// This test was forked from ortools/base/linked_hash_map_test.cc on Feb 25,
-// 2021. Some tests were deleted as they depended on code not visible from here.
-
-#include "ortools/base/linked_hash_map.h"
-
-#include <memory>
-#include <string>
-#include <tuple>
-#include <utility>
-#include <vector>
-
-#include "absl/container/internal/unordered_map_constructor_test.h"
-#include "absl/container/internal/unordered_map_lookup_test.h"
-#include "absl/container/internal/unordered_map_members_test.h"
-#include "absl/container/internal/unordered_map_modifiers_test.h"
-#include "absl/memory/memory.h"
-#include "absl/types/any.h"
-#include "gtest/gtest.h"
-#include "ortools/base/gmock.h"
-#include "util/gtl/map_util_test.h"
-
-namespace gtl {
-namespace {
-
-// Need to import the namespace to bring the names generated by GoogleTest for
-// the typed test suite.
-using namespace absl::container_internal;  // NOLINT
-
-using ::absl::container_internal::hash_internal::Enum;
-using ::absl::container_internal::hash_internal::EnumClass;
-
-template <class K, class V>
-using Map = linked_hash_map<K, V, StatefulTestingHash, StatefulTestingEqual,
-                            Alloc<std::pair<const K, V>>>;
-
-static_assert(!std::is_standard_layout<NonStandardLayout>(), "");
-
-using MapTypes =
-    ::testing::Types<Map<int, int>, Map<std::string, int>,
-                     Map<Enum, std::string>, Map<EnumClass, int>,
-                     Map<int, NonStandardLayout>, Map<NonStandardLayout, int>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(LinkedHashMap, ConstructorTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(LinkedHashMap, LookupTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(LinkedHashMap, MembersTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(LinkedHashMap, ModifiersTest, MapTypes);
-
-using ::testing::ElementsAre;
-using ::testing::Pair;
-using ::testing::Pointee;
-
-// Tests that the range constructor works.
-TEST(LinkedHashMapTest, RangeConstruct) {
-  const std::pair<int, int> items[] = {{1, 2}, {2, 3}, {3, 4}};
-  EXPECT_THAT((linked_hash_map<int, int>(std::begin(items), std::end(items))),
-              ElementsAre(Pair(1, 2), Pair(2, 3), Pair(3, 4)));
-}
-
-// Tests that copying works.
-TEST(LinkedHashMapTest, Copy) {
-  linked_hash_map<int, int> m{{2, 12}, {3, 13}};
-  // NOLINTNEXTLINE(performance-unnecessary-copy-initialization)
-  auto copy = m;
-
-  EXPECT_TRUE(copy.contains(2));
-  auto found = copy.find(2);
-  ASSERT_TRUE(found != copy.end());
-  for (auto iter = copy.begin(); iter != copy.end(); ++iter) {
-    if (iter == found) return;
-  }
-  FAIL() << "Copied map's find method returned an invalid iterator.";
-}
-
-// Tests that assignment works.
-TEST(LinkedHashMapTest, Assign) {
-  linked_hash_map<int, int> m{{2, 12}, {3, 13}};
-  linked_hash_map<int, int> n{{4, 14}};
-
-  n = m;
-  EXPECT_TRUE(n.contains(2));
-  auto found = n.find(2);
-  ASSERT_TRUE(found != n.end());
-  for (auto iter = n.begin(); iter != n.end(); ++iter) {
-    if (iter == found) return;
-  }
-  FAIL() << "Assigned map's find method returned an invalid iterator.";
-}
-
-// Tests that move constructor works.
-TEST(LinkedHashMapTest, Move) {
-  // Use unique_ptr as an example of a non-copyable type.
-  linked_hash_map<int, std::unique_ptr<int>> m;
-  m[2] = std::make_unique<int>(12);
-  m[3] = std::make_unique<int>(13);
-  linked_hash_map<int, std::unique_ptr<int>> n = std::move(m);
-  EXPECT_THAT(n, ElementsAre(Pair(2, Pointee(12)), Pair(3, Pointee(13))));
-}
-
-TEST(LinkedHashMapTest, CanInsertMoveOnly) {
-  linked_hash_map<int, std::unique_ptr<int>> m;
-  struct Data {
-    int k, v;
-  };
-  const Data data[] = {{1, 123}, {3, 345}, {2, 234}, {4, 456}};
-  for (const auto& kv : data)
-    m.insert({kv.k, std::make_unique<int>(int{kv.v})});
-  EXPECT_TRUE(m.contains(2));
-  auto found = m.find(2);
-  ASSERT_TRUE(found != m.end());
-  EXPECT_EQ(234, *found->second);
-}
-
-TEST(LinkedHashMapTest, CanEmplaceMoveOnly) {
-  linked_hash_map<int, std::unique_ptr<int>> m;
-  struct Data {
-    int k, v;
-  };
-  const Data data[] = {{1, 123}, {3, 345}, {2, 234}, {4, 456}};
-  for (const auto& kv : data) {
-    m.emplace(std::piecewise_construct, std::make_tuple(kv.k),
-              std::make_tuple(new int{kv.v}));
-  }
-  EXPECT_TRUE(m.contains(2));
-  auto found = m.find(2);
-  ASSERT_TRUE(found != m.end());
-  EXPECT_EQ(234, *found->second);
-}
-
-struct NoCopy {
-  explicit NoCopy(int x) : x(x) {}
-  NoCopy(const NoCopy&) = delete;
-  NoCopy& operator=(const NoCopy&) = delete;
-  NoCopy(NoCopy&&) = delete;
-  NoCopy& operator=(NoCopy&&) = delete;
-  int x;
-};
-
-TEST(LinkedHashMapTest, CanEmplaceNoMoveNoCopy) {
-  linked_hash_map<int, NoCopy> m;
-  struct Data {
-    int k, v;
-  };
-  const Data data[] = {{1, 123}, {3, 345}, {2, 234}, {4, 456}};
-  for (const auto& kv : data) {
-    m.emplace(std::piecewise_construct, std::make_tuple(kv.k),
-              std::make_tuple(kv.v));
-  }
-  EXPECT_TRUE(m.contains(2));
-  auto found = m.find(2);
-  ASSERT_TRUE(found != m.end());
-  EXPECT_EQ(234, found->second.x);
-}
-
-TEST(LinkedHashMapTest, ConstKeys) {
-  linked_hash_map<int, int> m;
-  m.insert(std::make_pair(1, 2));
-  // Test that keys are const in iteration.
-  std::pair<const int, int>& p = *m.begin();
-  EXPECT_EQ(1, p.first);
-}
-
-// Tests that iteration from begin() to end() works
-TEST(LinkedHashMapTest, Iteration) {
-  linked_hash_map<int, int> m;
-  EXPECT_TRUE(m.begin() == m.end());
-
-  m.insert(std::make_pair(2, 12));
-  m.insert(std::make_pair(1, 11));
-  m.insert(std::make_pair(3, 13));
-
-  linked_hash_map<int, int>::iterator i = m.begin();
-  ASSERT_TRUE(m.begin() == i);
-  ASSERT_TRUE(m.end() != i);
-  EXPECT_EQ(2, i->first);
-  EXPECT_EQ(12, i->second);
-
-  ++i;
-  ASSERT_TRUE(m.end() != i);
-  EXPECT_EQ(1, i->first);
-  EXPECT_EQ(11, i->second);
-
-  ++i;
-  ASSERT_TRUE(m.end() != i);
-  EXPECT_EQ(3, i->first);
-  EXPECT_EQ(13, i->second);
-
-  ++i;  // Should be the end of the line.
-  ASSERT_TRUE(m.end() == i);
-}
-
-// Tests that reverse iteration from rbegin() to rend() works
-TEST(LinkedHashMapTest, ReverseIteration) {
-  linked_hash_map<int, int> m;
-  EXPECT_TRUE(m.rbegin() == m.rend());
-
-  m.insert(std::make_pair(2, 12));
-  m.insert(std::make_pair(1, 11));
-  m.insert(std::make_pair(3, 13));
-
-  linked_hash_map<int, int>::reverse_iterator i = m.rbegin();
-  ASSERT_TRUE(m.rbegin() == i);
-  ASSERT_TRUE(m.rend() != i);
-  EXPECT_EQ(3, i->first);
-  EXPECT_EQ(13, i->second);
-
-  ++i;
-  ASSERT_TRUE(m.rend() != i);
-  EXPECT_EQ(1, i->first);
-  EXPECT_EQ(11, i->second);
-
-  ++i;
-  ASSERT_TRUE(m.rend() != i);
-  EXPECT_EQ(2, i->first);
-  EXPECT_EQ(12, i->second);
-
-  ++i;  // Should be the end of the line.
-  ASSERT_TRUE(m.rend() == i);
-}
-
-// Tests that clear() works
-TEST(LinkedHashMapTest, Clear) {
-  linked_hash_map<int, int> m;
-  m.insert(std::make_pair(2, 12));
-  m.insert(std::make_pair(1, 11));
-  m.insert(std::make_pair(3, 13));
-
-  ASSERT_EQ(3, m.size());
-
-  m.clear();
-
-  EXPECT_EQ(0, m.size());
-
-  m.clear();  // Make sure we can call it on an empty map.
-
-  EXPECT_EQ(0, m.size());
-}
-
-// Tests that size() works.
-TEST(LinkedHashMapTest, Size) {
-  linked_hash_map<int, int> m;
-  EXPECT_EQ(0, m.size());
-  m.insert(std::make_pair(2, 12));
-  EXPECT_EQ(1, m.size());
-  m.insert(std::make_pair(1, 11));
-  EXPECT_EQ(2, m.size());
-  m.insert(std::make_pair(3, 13));
-  EXPECT_EQ(3, m.size());
-  m.clear();
-  EXPECT_EQ(0, m.size());
-}
-
-// Tests empty()
-TEST(LinkedHashMapTest, Empty) {
-  linked_hash_map<int, int> m;
-  ASSERT_TRUE(m.empty());
-  m.insert(std::make_pair(2, 12));
-  ASSERT_FALSE(m.empty());
-  m.clear();
-  ASSERT_TRUE(m.empty());
-}
-
-TEST(LinkedHashMapTest, Erase) {
-  linked_hash_map<int, int> m;
-  ASSERT_EQ(0, m.size());
-  EXPECT_EQ(0, m.erase(2));  // Nothing to erase yet
-
-  m.insert(std::make_pair(2, 12));
-  ASSERT_EQ(1, m.size());
-  EXPECT_EQ(1, m.erase(2));
-  EXPECT_EQ(0, m.size());
-
-  EXPECT_EQ(0, m.erase(2));  // Make sure nothing bad happens if we repeat.
-  EXPECT_EQ(0, m.size());
-}
-
-TEST(LinkedHashMapTest, Erase2) {
-  linked_hash_map<int, int> m;
-  ASSERT_EQ(0, m.size());
-  EXPECT_EQ(0, m.erase(2));  // Nothing to erase yet
-
-  m.insert(std::make_pair(2, 12));
-  m.insert(std::make_pair(1, 11));
-  m.insert(std::make_pair(3, 13));
-  m.insert(std::make_pair(4, 14));
-  ASSERT_EQ(4, m.size());
-
-  // Erase middle two
-  EXPECT_EQ(1, m.erase(1));
-  EXPECT_EQ(1, m.erase(3));
-
-  EXPECT_EQ(2, m.size());
-
-  // Make sure we can still iterate over everything that's left.
-  linked_hash_map<int, int>::iterator it = m.begin();
-  ASSERT_TRUE(it != m.end());
-  EXPECT_EQ(12, it->second);
-  ++it;
-  ASSERT_TRUE(it != m.end());
-  EXPECT_EQ(14, it->second);
-  ++it;
-  ASSERT_TRUE(it == m.end());
-
-  EXPECT_EQ(0, m.erase(1));  // Make sure nothing bad happens if we repeat.
-  ASSERT_EQ(2, m.size());
-
-  EXPECT_EQ(1, m.erase(2));
-  EXPECT_EQ(1, m.erase(4));
-  ASSERT_EQ(0, m.size());
-
-  EXPECT_EQ(0, m.erase(1));  // Make sure nothing bad happens if we repeat.
-  ASSERT_EQ(0, m.size());
-}
-
-// Test that erase(iter,iter) and erase(iter) compile and work.
-TEST(LinkedHashMapTest, Erase3) {
-  linked_hash_map<int, int> m;
-
-  m.insert(std::make_pair(1, 11));
-  m.insert(std::make_pair(2, 12));
-  m.insert(std::make_pair(3, 13));
-  m.insert(std::make_pair(4, 14));
-
-  // Erase middle two
-  linked_hash_map<int, int>::iterator it2 = m.find(2);
-  linked_hash_map<int, int>::iterator it4 = m.find(4);
-  EXPECT_EQ(m.erase(it2, it4), m.find(4));
-  EXPECT_EQ(2, m.size());
-
-  // Make sure we can still iterate over everything that's left.
-  linked_hash_map<int, int>::iterator it = m.begin();
-  ASSERT_TRUE(it != m.end());
-  EXPECT_EQ(11, it->second);
-  ++it;
-  ASSERT_TRUE(it != m.end());
-  EXPECT_EQ(14, it->second);
-  ++it;
-  ASSERT_TRUE(it == m.end());
-
-  // Erase first one using an iterator.
-  EXPECT_EQ(m.erase(m.begin()), m.find(4));
-
-  // Only the last element should be left.
-  it = m.begin();
-  ASSERT_TRUE(it != m.end());
-  EXPECT_EQ(14, it->second);
-  ++it;
-  ASSERT_TRUE(it == m.end());
-}
-
-// Test all types of insertion
-TEST(LinkedHashMapTest, Insertion) {
-  linked_hash_map<int, int> m;
-  ASSERT_EQ(0, m.size());
-  std::pair<linked_hash_map<int, int>::iterator, bool> result;
-
-  result = m.insert(std::make_pair(2, 12));
-  ASSERT_EQ(1, m.size());
-  EXPECT_TRUE(result.second);
-  EXPECT_EQ(2, result.first->first);
-  EXPECT_EQ(12, result.first->second);
-
-  result = m.insert(std::make_pair(1, 11));
-  ASSERT_EQ(2, m.size());
-  EXPECT_TRUE(result.second);
-  EXPECT_EQ(1, result.first->first);
-  EXPECT_EQ(11, result.first->second);
-
-  result = m.insert(std::make_pair(3, 13));
-  linked_hash_map<int, int>::iterator result_iterator = result.first;
-  ASSERT_EQ(3, m.size());
-  EXPECT_TRUE(result.second);
-  EXPECT_EQ(3, result.first->first);
-  EXPECT_EQ(13, result.first->second);
-
-  result = m.insert(std::make_pair(3, 13));
-  EXPECT_EQ(3, m.size());
-  EXPECT_FALSE(result.second) << "No insertion should have occurred.";
-  EXPECT_TRUE(result_iterator == result.first)
-      << "Duplicate insertion should have given us the original iterator.";
-
-  std::vector<std::pair<int, int>> v = {{3, 13}, {4, 14}, {5, 15}};
-  m.insert(v.begin(), v.end());
-  // Expect 4 and 5 inserted, 3 not inserted.
-  EXPECT_EQ(5, m.size());
-  EXPECT_EQ(14, m.at(4));
-  EXPECT_EQ(15, m.at(5));
-}
-
-static std::pair<const int, int> Pair(int i, int j) { return {i, j}; }
-
-// Test front accessors.
-TEST(LinkedHashMapTest, Front) {
-  linked_hash_map<int, int> m;
-
-  m.insert(std::make_pair(2, 12));
-  m.insert(std::make_pair(1, 11));
-  m.insert(std::make_pair(3, 13));
-
-  EXPECT_EQ(3, m.size());
-  EXPECT_EQ(Pair(2, 12), m.front());
-  m.pop_front();
-  EXPECT_EQ(2, m.size());
-  EXPECT_EQ(Pair(1, 11), m.front());
-  m.pop_front();
-  EXPECT_EQ(1, m.size());
-  EXPECT_EQ(Pair(3, 13), m.front());
-  m.pop_front();
-  EXPECT_TRUE(m.empty());
-}
-
-// Test back accessors.
-TEST(LinkedHashMapTest, Back) {
-  linked_hash_map<int, int> m;
-
-  m.insert(std::make_pair(2, 12));
-  m.insert(std::make_pair(1, 11));
-  m.insert(std::make_pair(3, 13));
-
-  EXPECT_EQ(3, m.size());
-  EXPECT_EQ(Pair(3, 13), m.back());
-  m.pop_back();
-  EXPECT_EQ(2, m.size());
-  EXPECT_EQ(Pair(1, 11), m.back());
-  m.pop_back();
-  EXPECT_EQ(1, m.size());
-  EXPECT_EQ(Pair(2, 12), m.back());
-  m.pop_back();
-  EXPECT_TRUE(m.empty());
-}
-
-TEST(LinkedHashMapTest, Find) {
-  linked_hash_map<int, int> m;
-
-  EXPECT_TRUE(m.end() == m.find(1))
-      << "We shouldn't find anything in an empty map.";
-
-  m.insert(std::make_pair(2, 12));
-  EXPECT_TRUE(m.end() == m.find(1))
-      << "We shouldn't find an element that doesn't exist in the map.";
-
-  std::pair<linked_hash_map<int, int>::iterator, bool> result =
-      m.insert(std::make_pair(1, 11));
-  ASSERT_TRUE(result.second);
-  ASSERT_TRUE(m.end() != result.first);
-  EXPECT_TRUE(result.first == m.find(1))
-      << "We should have found an element we know exists in the map.";
-  EXPECT_EQ(11, result.first->second);
-
-  // Check that a follow-up insertion doesn't affect our original
-  m.insert(std::make_pair(3, 13));
-  linked_hash_map<int, int>::iterator it = m.find(1);
-  ASSERT_TRUE(m.end() != it);
-  EXPECT_EQ(11, it->second);
-
-  m.clear();
-  EXPECT_TRUE(m.end() == m.find(1))
-      << "We shouldn't find anything in a map that we've cleared.";
-}
-
-TEST(LinkedHashMapTest, Contains) {
-  linked_hash_map<int, int> m;
-
-  EXPECT_FALSE(m.contains(1)) << "An empty map shouldn't contain anything.";
-
-  m.insert(std::make_pair(2, 12));
-  EXPECT_FALSE(m.contains(1))
-      << "The map shouldn't contain an element that doesn't exist.";
-
-  m.insert(std::make_pair(1, 11));
-  EXPECT_TRUE(m.contains(1))
-      << "The map should contain an element that we know exists.";
-
-  m.clear();
-  EXPECT_FALSE(m.contains(1))
-      << "A map that we've cleared shouldn't contain anything.";
-}
-
-TEST(LinkedHashMapTest, At) {
-  linked_hash_map<int, int> m = {{1, 2}};
-  EXPECT_EQ(2, m.at(1));
-  EXPECT_DEATH(m.at(3), ".*linked_hash_map::at.*");
-
-  const linked_hash_map<int, int> cm = {{1, 2}};
-  EXPECT_EQ(2, cm.at(1));
-  EXPECT_DEATH(cm.at(3), ".*linked_hash_map::at.*");
-}
-
-TEST(LinkedHashMapTest, Swap) {
-  linked_hash_map<int, int> m1;
-  linked_hash_map<int, int> m2;
-  m1.insert(std::make_pair(1, 1));
-  m1.insert(std::make_pair(2, 2));
-  m2.insert(std::make_pair(3, 3));
-  ASSERT_EQ(2, m1.size());
-  ASSERT_EQ(1, m2.size());
-  m1.swap(m2);
-  ASSERT_EQ(1, m1.size());
-  ASSERT_EQ(2, m2.size());
-}
-
-TEST(LinkedHashMapTest, InitializerList) {
-  linked_hash_map<int, int> m{{1, 2}, {3, 4}};
-  ASSERT_EQ(2, m.size());
-  EXPECT_TRUE(m.contains(1));
-  linked_hash_map<int, int>::iterator it = m.find(1);
-  ASSERT_TRUE(m.end() != it);
-  EXPECT_EQ(2, it->second);
-  EXPECT_TRUE(m.contains(3));
-  it = m.find(3);
-  ASSERT_TRUE(m.end() != it);
-  EXPECT_EQ(4, it->second);
-}
-
-TEST(LinkedHashMapTest, CustomHashAndEquality) {
-  struct CustomIntHash {
-    size_t operator()(int x) const { return x; }
-  };
-  struct CustomIntEq {
-    bool operator()(int x, int y) const { return x == y; }
-  };
-  linked_hash_map<int, int, CustomIntHash, CustomIntEq> m;
-  m.insert(std::make_pair(1, 1));
-  EXPECT_TRUE(m.contains(1));
-  EXPECT_EQ(1, m[1]);
-}
-
-TEST(LinkedHashMapTest, EqualRange) {
-  linked_hash_map<int, int> m{{3, 11}, {1, 13}};
-  const auto& const_m = m;
-
-  EXPECT_THAT(m.equal_range(2), testing::Pair(m.end(), m.end()));
-  EXPECT_THAT(const_m.equal_range(2),
-              testing::Pair(const_m.end(), const_m.end()));
-
-  EXPECT_THAT(m.equal_range(1), testing::Pair(m.find(1), ++m.find(1)));
-  EXPECT_THAT(const_m.equal_range(1),
-              testing::Pair(const_m.find(1), ++const_m.find(1)));
-}
-
-TEST(LinkedHashMapTest, ReserveWorks) {
-  linked_hash_map<int, int> m;
-  EXPECT_GE(10000, m.capacity());
-  EXPECT_EQ(0, m.size());
-  EXPECT_EQ(0.0, m.load_factor());
-  m.reserve(100'000);
-  const int capacity_before_insert = m.capacity();
-  EXPECT_LE(100'000, capacity_before_insert);
-  EXPECT_EQ(0, m.size());
-  EXPECT_EQ(0.0, m.load_factor());
-  m.emplace(1, 1);
-  m.emplace(2, 2);
-  EXPECT_EQ(capacity_before_insert, m.capacity());
-  EXPECT_EQ(2, m.size());
-  EXPECT_LT(0.0, m.load_factor());
-}
-
-TEST(LinkedHashMapTest, HeterogeneousStringViewLookup) {
-  linked_hash_map<std::string, int> map;
-  map["foo"] = 1;
-  map["bar"] = 2;
-  map["blah"] = 3;
-
-  {
-    absl::string_view lookup("foo");
-    auto itr = map.find(lookup);
-    ASSERT_NE(itr, map.end());
-    EXPECT_EQ(1, itr->second);
-  }
-
-  // Not found.
-  {
-    absl::string_view lookup("foobar");
-    EXPECT_EQ(map.end(), map.find(lookup));
-  }
-
-  {
-    absl::string_view lookup("blah");
-    auto itr = map.find(lookup);
-    ASSERT_NE(itr, map.end());
-    EXPECT_EQ(3, itr->second);
-  }
-}
-
-TEST(LinkedHashMapTest, UniversalReferenceWorks) {
-  linked_hash_map<std::string, int> map;
-  std::string s = "very very very very very long string";
-  map[s] = 1;
-  EXPECT_EQ(s, "very very very very very long string");
-}
-
-TEST(LinkedHashMap, ExtractInsert) {
-  linked_hash_map<int, int> m = {{1, 7}, {2, 9}};
-  auto node = m.extract(1);
-  EXPECT_TRUE(node);
-  EXPECT_EQ(node.key(), 1);
-  EXPECT_EQ(node.mapped(), 7);
-  EXPECT_THAT(m, ElementsAre(Pair(2, 9)));
-  EXPECT_FALSE(m.contains(1));
-  EXPECT_TRUE(m.contains(2));
-
-  node.mapped() = 17;
-  m.insert(std::move(node));
-  EXPECT_FALSE(node);
-  EXPECT_THAT(m, ElementsAre(Pair(2, 9), Pair(1, 17)));
-  EXPECT_TRUE(m.contains(2));
-  EXPECT_TRUE(m.contains(1));
-
-  node = m.extract(m.find(1));
-  EXPECT_TRUE(node);
-  EXPECT_EQ(node.key(), 1);
-  EXPECT_EQ(node.mapped(), 17);
-  EXPECT_THAT(m, ElementsAre(Pair(2, 9)));
-}
-
-TEST(LinkedHashMap, Merge) {
-  linked_hash_map<int, int> m = {{1, 7}, {3, 6}};
-  linked_hash_map<int, int> src = {{1, 10}, {2, 9}, {4, 16}};
-
-  m.merge(src);
-
-  EXPECT_THAT(m, ElementsAre(Pair(1, 7), Pair(3, 6), Pair(2, 9), Pair(4, 16)));
-  EXPECT_THAT(src, ElementsAre(Pair(1, 10)));
-  for (int i : {2, 9, 4}) {
-    EXPECT_FALSE(src.contains(i));
-  }
-}
-
-TEST(LinkedHashMap, EraseRange) {
-  linked_hash_map<int, int> map = {{1, 1},  {2, 4},  {3, 9},  {4, 16}, {5, 25},
-                                   {6, 36}, {7, 49}, {8, 64}, {9, 81}};
-  auto start = map.find(3);
-  auto end = map.find(8);
-  auto itr = map.erase(start, end);
-  ASSERT_NE(itr, map.end());
-  EXPECT_THAT(*itr, Pair(8, 64));
-  EXPECT_THAT(map,
-              ElementsAre(Pair(1, 1), Pair(2, 4), Pair(8, 64), Pair(9, 81)));
-  for (int i : {1, 2, 8, 9}) {
-    EXPECT_TRUE(map.contains(i));
-  }
-  for (int i : {3, 4, 5, 6, 7}) {
-    EXPECT_FALSE(map.contains(i));
-  }
-}
-
-TEST(LinkedHashMap, InsertInitializerList) {
-  linked_hash_map<int, int> m;
-  m.insert({{1, 7}, {2, 9}, {3, 29}});
-  EXPECT_THAT(m, ElementsAre(Pair(1, 7), Pair(2, 9), Pair(3, 29)));
-}
-
-TEST(LinkedHashMap, InsertOrAssign) {
-  linked_hash_map<int, int> m;
-  {
-    auto [itr, elem_inserted] = m.insert_or_assign(10, 20);
-    EXPECT_THAT(*itr, Pair(10, 20));
-    EXPECT_EQ(elem_inserted, true);
-  }
-  {
-    auto [itr, elem_inserted] = m.insert_or_assign(10, 30);
-    EXPECT_THAT(*itr, Pair(10, 30));
-    EXPECT_EQ(elem_inserted, false);
-  }
-}
-
-TEST(LinkedHashMap, TryEmplace) {
-  linked_hash_map<int, std::pair<int, std::string>> m;
-  {
-    auto [itr, elem_inserted] = m.try_emplace(10, 20, "string");
-    EXPECT_THAT(*itr, Pair(10, Pair(20, "string")));
-    EXPECT_EQ(elem_inserted, true);
-  }
-  {
-    std::string s = "some string";
-    auto [itr, elem_inserted] = m.try_emplace(10, 2, std::move(s));
-    EXPECT_THAT(*itr, Pair(10, Pair(20, "string")));
-    EXPECT_EQ(elem_inserted, false);
-  }
-}
-
-TEST(LinkedHashMapTest, TryEmplace) {
-  linked_hash_map<int, std::tuple<int, std::string, std::unique_ptr<float>>>
-      map;
-  auto result = map.try_emplace(3, 2, "foo", new float(1.0));
-  EXPECT_TRUE(result.second);
-  EXPECT_EQ(std::get<0>(result.first->second), 2);
-  EXPECT_EQ(std::get<1>(result.first->second), "foo");
-  EXPECT_EQ(*std::get<2>(result.first->second), 1.0);
-
-  // Ptr should not be moved.
-  auto ptr = std::make_unique<float>(3.0);
-  auto result2 = map.try_emplace(3, 22, "foo-bar", std::move(ptr));
-  EXPECT_FALSE(result2.second);
-  EXPECT_EQ(std::get<0>(result.first->second), 2);
-  EXPECT_EQ(std::get<1>(result.first->second), "foo");
-  EXPECT_EQ(*std::get<2>(result.first->second), 1.0);
-  EXPECT_NE(ptr.get(), nullptr);
-}
-
-}  // namespace
-}  // namespace gtl
-
-REGISTER_TYPED_TEST_SUITE_P(MapUtilIntIntTest, ValueMapTests,
-                            UpdateReturnCopyTest, InsertOrReturnExistingTest,
-                            FindOrDieTest, InsertOrDieTest, InsertKeyOrDieTest);
-typedef ::testing::Types<ortools_gtl::linked_hash_map<int, int>>
-    LinkedHashMapIntIntTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(LinkedHashMapUtilTest, MapUtilIntIntTest,
-                               LinkedHashMapIntIntTypes);
-
-REGISTER_TYPED_TEST_SUITE_P(MapUtilIntIntPtrTest, LookupOrInsertNewTest,
-                            InsertAndDeleteExistingTest, FindPtrOrNullTest,
-                            EraseKeyReturnValuePtrTest);
-typedef ::testing::Types<ortools_gtl::linked_hash_map<int, int*>>
-    LinkedHashMapIntIntPtrTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(LinkedHashMapUtilTest, MapUtilIntIntPtrTest,
-                               LinkedHashMapIntIntPtrTypes);