diff --git a/hash.c b/hash.c
index 182f41a288adab..41d5a1dfe61bdd 100644
--- a/hash.c
+++ b/hash.c
@@ -712,7 +712,7 @@ ar_force_convert_table(VALUE hash, const char *file, int line)
         RUBY_ASSERT(rb_gc_obj_slot_size(hash) >= sizeof(struct RHash) + sizeof(ar_table));
 
         // prepare hash values
-        do {
+        while (1) {
             st_data_t keys[RHASH_AR_TABLE_MAX_SIZE];
             bound = RHASH_AR_TABLE_BOUND(hash);
             size = RHASH_AR_TABLE_SIZE(hash);
@@ -727,7 +727,9 @@ ar_force_convert_table(VALUE hash, const char *file, int line)
             if (UNLIKELY(!RHASH_AR_TABLE_P(hash))) return RHASH_ST_TABLE(hash);
             if (UNLIKELY(RHASH_AR_TABLE_BOUND(hash) != bound)) continue;
             if (UNLIKELY(ar_each_key(ar, bound, ar_each_key_cmp, keys, NULL, NULL))) continue;
-        } while (0);
+
+            break;
+        }
 
         // make st
         st_table tab;
diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index 0d37f89772fb3c..ac37929386592c 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -403,10 +403,6 @@ def write_lock(file, preserve_unknown_sections)
 
       contents = to_lock
 
-      # Convert to \r\n if the existing lock has them
-      # i.e., Windows with `git config core.autocrlf=true`
-      contents.gsub!(/\n/, "\r\n") if @lockfile_contents.match?("\r\n")
-
       if @locked_bundler_version
         locked_major = @locked_bundler_version.segments.first
         current_major = bundler_version_to_lock.segments.first
@@ -427,6 +423,14 @@ def write_lock(file, preserve_unknown_sections)
         return
       end
 
+      # Convert to \r\n if the existing lock has them, i.e., Windows with
+      # `git config core.autocrlf=true`. Detect from the bytes on disk because
+      # reading in text mode strips carriage returns on Windows, which would
+      # otherwise defeat this check and rewrite a `\r\n` lockfile with `\n`.
+      if File.exist?(file) && SharedHelpers.filesystem_access(file, :read) {|p| File.binread(p).include?("\r\n") }
+        contents.gsub!(/\n/, "\r\n")
+      end
+
       begin
         SharedHelpers.filesystem_access(file) do |p|
           File.open(p, "wb") {|f| f.puts(contents) }
diff --git a/spec/bundler/install/deploy_spec.rb b/spec/bundler/install/deploy_spec.rb
index a3b4a87ecfaa8d..5bdb8f6194f518 100644
--- a/spec/bundler/install/deploy_spec.rb
+++ b/spec/bundler/install/deploy_spec.rb
@@ -44,8 +44,6 @@
   end
 
   it "works when you bundle exec bundle" do
-    skip "doesn't find bundle" if Gem.win_platform?
-
     bundle :install
     bundle_config "deployment true"
     bundle :install
diff --git a/spec/bundler/install/gemfile/git_spec.rb b/spec/bundler/install/gemfile/git_spec.rb
index f2138b5fda2088..ee4c91a4f2b4a6 100644
--- a/spec/bundler/install/gemfile/git_spec.rb
+++ b/spec/bundler/install/gemfile/git_spec.rb
@@ -427,8 +427,6 @@
     context "when the branch starts with a `#`" do
       let(:branch) { "#149/redirect-url-fragment" }
       it "works" do
-        skip "git does not accept this" if Gem.win_platform?
-
         update_git("foo", path: repo, branch: branch)
 
         install_gemfile <<-G
@@ -481,8 +479,6 @@
     context "when the tag starts with a `#`" do
       let(:tag) { "#149/redirect-url-fragment" }
       it "works" do
-        skip "git does not accept this" if Gem.win_platform?
-
         update_git("foo", path: repo, tag: tag)
 
         install_gemfile <<-G
diff --git a/spec/bundler/install/yanked_spec.rb b/spec/bundler/install/yanked_spec.rb
index fb9316cced8a4c..02c1c360be7714 100644
--- a/spec/bundler/install/yanked_spec.rb
+++ b/spec/bundler/install/yanked_spec.rb
@@ -54,8 +54,6 @@
     end
 
     before do
-      skip "Materialization on Windows is not yet strict, so the example does not detect the gem has been yanked" if Gem.win_platform?
-
       build_repo4 do
         build_gem "foo", "1.0.0"
         build_gem "foo", "1.0.1"
diff --git a/spec/bundler/lock/lockfile_spec.rb b/spec/bundler/lock/lockfile_spec.rb
index 84b74823d47759..3ee0705c652e22 100644
--- a/spec/bundler/lock/lockfile_spec.rb
+++ b/spec/bundler/lock/lockfile_spec.rb
@@ -2335,9 +2335,7 @@ def set_lockfile_mtime_to_known_value
         expect(the_bundle).to include_gems "myrack 1.2"
       end
 
-      it "preserves Gemfile.lock \\n\\r line endings" do
-        skip "needs to be adapted" if Gem.win_platform?
-
+      it "preserves Gemfile.lock \\r\\n line endings" do
         update_repo2 do
           build_gem "myrack", "1.2" do |s|
             s.executables = "myrackup"
@@ -2349,7 +2347,7 @@ def set_lockfile_mtime_to_known_value
         set_lockfile_mtime_to_known_value
 
         expect { bundle "update", all: true }.to change { File.mtime(bundled_app_lock) }
-        expect(File.read(bundled_app_lock)).to match("\r\n")
+        expect(File.binread(bundled_app_lock)).to match("\r\n")
 
         expect(the_bundle).to include_gems "myrack 1.2"
       end
@@ -2365,7 +2363,7 @@ def set_lockfile_mtime_to_known_value
         end.not_to change { File.mtime(bundled_app_lock) }
       end
 
-      it "preserves Gemfile.lock \\n\\r line endings" do
+      it "preserves Gemfile.lock \\r\\n line endings" do
         win_lock = File.read(bundled_app_lock).gsub(/\n/, "\r\n")
         File.open(bundled_app_lock, "wb") {|f| f.puts(win_lock) }
         set_lockfile_mtime_to_known_value
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
index feffe36aae028d..91aad11da97d6d 100644
--- a/test/ruby/test_gc.rb
+++ b/test/ruby/test_gc.rb
@@ -194,8 +194,14 @@ def test_stat_argument
   def test_stat_single
     omit 'stress' if GC.stress
 
-    stat = GC.stat
-    assert_equal stat[:count], GC.stat(:count)
+    # GC.stat and GC.stat(:count) are two separate reads of :count. If a GC
+    # runs between them (e.g. triggered by an allocation on another thread),
+    # :count changes and the two reads disagree. Disable GC so both reads
+    # observe the same :count.
+    EnvUtil.without_gc do
+      stat = GC.stat
+      assert_equal stat[:count], GC.stat(:count)
+    end
     assert_raise(ArgumentError){ GC.stat(:invalid) }
   end