--jobs=4

.bazelrc

@@ -86,6 +86,11 @@ build:windows --noremote_accept_cached
 # problem on CI if all builds share a similar directory structure.
 build:windows-ci --remote_accept_cached=false
 
+# The Windows CI machines have 4 physical and 8 logical cores. By default Bazel
+# will parallelize up to the number of logical cores. This can cause flakyness
+# in timing sensitive tests.
+build:windows-ci --jobs=4
+
 # Instruct bazel to globally use this flag for compiling protobuf files.
 # We need the source info for generating proto docs. By default proto_library strips
 # source information and doesn't provide an option to turn this flag on.