2 files changed, 5 insertions, 3 deletions
diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb
index c5e35a146b..4c2723addc 100644
--- a/activerecord/test/cases/associations/has_many_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb
@@ -891,7 +891,8 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
     company = companies(:rails_core)
     ids = [Developer.first.id, -9999]
     e = assert_raises(ActiveRecord::RecordNotFound) { company.developer_ids = ids }
-    assert_match(/Couldn't find all Developers with 'id'/, e.message)
+    msg = "Couldn't find all Developers with 'id': (1, -9999) (found 1 results, but was looking for 2). Couldn't find Developer with id -9999."
+    assert_equal(msg, e.message)
   end
 
   def test_collection_singular_ids_setter_raises_exception_when_invalid_ids_set_with_changed_primary_key
@@ -905,7 +906,8 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
     author = authors(:david)
     ids = [categories(:general).name, "Unknown"]
     e = assert_raises(ActiveRecord::RecordNotFound) { author.essay_category_ids = ids }
-    assert_equal "Couldn't find all Categories with 'name': (General, Unknown) (found 1 results, but was looking for 2)", e.message
+    msg = "Couldn't find all Categories with 'name': (General, Unknown) (found 1 results, but was looking for 2). Couldn't find Category with name Unknown."
+    assert_equal msg, e.message
   end
 
   def test_build_a_model_from_hm_through_association_with_where_clause
diff --git a/activerecord/test/cases/finder_test.rb b/activerecord/test/cases/finder_test.rb
index a0d87dfb90..55496147c1 100644
--- a/activerecord/test/cases/finder_test.rb
+++ b/activerecord/test/cases/finder_test.rb
@@ -1153,7 +1153,7 @@ class FinderTest < ActiveRecord::TestCase
       e = assert_raises(ActiveRecord::RecordNotFound) do
         model.find "Hello", "World!"
       end
-      assert_equal "Couldn't find all MercedesCars with 'name': (Hello, World!) (found 0 results, but was looking for 2)", e.message
+      assert_equal "Couldn't find all MercedesCars with 'name': (Hello, World!) (found 0 results, but was looking for 2).", e.message
     end
   end