diff --git a/test/java/testutil/java_toolchain_info_subject.bzl b/test/java/testutil/java_toolchain_info_subject.bzl
index e52302a..a3304f4 100644
--- a/test/java/testutil/java_toolchain_info_subject.bzl
+++ b/test/java/testutil/java_toolchain_info_subject.bzl
@@ -7,6 +7,8 @@
     public = struct(
         jacocorunner = lambda: subjects.file(info.jacocorunner.executable, meta.derive("jacocorunner.executable")),
         timezone_data = lambda: subjects.file(info._timezone_data, meta.derive("_timezone_data")),
+        header_compiler_builtin_processors = lambda: subjects.collection(info._header_compiler_builtin_processors.to_list(), meta.derive("_header_compiler_builtin_processors")),
+        reduced_classpath_incompatible_processors = lambda: subjects.collection(info._reduced_classpath_incompatible_processors.to_list(), meta.derive("_reduced_classpath_incompatible_processors")),
     )
     return public
 
diff --git a/test/java/toolchains/java_toolchain_tests.bzl b/test/java/toolchains/java_toolchain_tests.bzl
index 07a3ce5..1beca09 100644
--- a/test/java/toolchains/java_toolchain_tests.bzl
+++ b/test/java/toolchains/java_toolchain_tests.bzl
@@ -302,6 +302,40 @@
     # Implicitly succeeds.
     pass
 
+def _test_header_compiler_builtin_processors(name):
+    util.helper_target(
+        java_toolchain,
+        name = name + "/java_toolchain",
+        header_compiler_builtin_processors = ["BuiltinProc1", "BuiltinProc2"],
+        singlejar = "singlejar",
+    )
+
+    analysis_test(
+        name = name,
+        impl = _test_header_compiler_builtin_processors_impl,
+        target = name + "/java_toolchain",
+    )
+
+def _test_header_compiler_builtin_processors_impl(env, target):
+    java_toolchain_info_subject.from_target(env, target).header_compiler_builtin_processors().contains_exactly(["BuiltinProc1", "BuiltinProc2"])
+
+def _test_reduced_classpath_incompatible_processors(name):
+    util.helper_target(
+        java_toolchain,
+        name = name + "/java_toolchain",
+        reduced_classpath_incompatible_processors = ["IncompatibleProc1", "IncompatibleProc2"],
+        singlejar = "singlejar",
+    )
+
+    analysis_test(
+        name = name,
+        impl = _test_reduced_classpath_incompatible_processors_impl,
+        target = name + "/java_toolchain",
+    )
+
+def _test_reduced_classpath_incompatible_processors_impl(env, target):
+    java_toolchain_info_subject.from_target(env, target).reduced_classpath_incompatible_processors().contains_exactly(["IncompatibleProc1", "IncompatibleProc2"])
+
 def java_toolchain_tests(name):
     test_suite(
         name = name,
@@ -316,5 +350,7 @@
             _test_no_header_compiler_header_compilation_enabled_fails,
             _test_no_header_compiler_direct_header_compilation_enabled_fails,
             _test_no_header_compiler_header_compilation_disabled_analyzes_successfully,
+            _test_header_compiler_builtin_processors,
+            _test_reduced_classpath_incompatible_processors,
         ],
     )