diff --git a/test/propshaft/asset_test.rb b/test/propshaft/asset_test.rb
index 83861e8..5c0749c 100644
--- a/test/propshaft/asset_test.rb
+++ b/test/propshaft/asset_test.rb
@@ -41,7 +41,7 @@ class Propshaft::AssetTest < ActiveSupport::TestCase
     assert_equal "file-not.digested-e206c34f.css",
       find_asset("file-not.digested.css").digested_path.to_s
 
-    assert_equal "file-is-a-sourcemap-da39a3ee5e6b4b0d3255bfef95601890afd80709.js.map",
+    assert_equal "file-is-a-sourcemap-da39a3ee.js.map",
       find_asset("file-is-a-sourcemap.js.map").digested_path.to_s
   end
 
diff --git a/test/propshaft/compiler/source_mapping_urls_test.rb b/test/propshaft/compiler/source_mapping_urls_test.rb
index 1f7d5cb..ca06d20 100644
--- a/test/propshaft/compiler/source_mapping_urls_test.rb
+++ b/test/propshaft/compiler/source_mapping_urls_test.rb
@@ -54,9 +54,9 @@ class Propshaft::Compiler::SourceMappingUrlsTest < ActiveSupport::TestCase
   end
 
   test "sourceMapURL is already prefixed with url_prefix" do
-    assert_match %r{//# sourceMappingURL=/assets/sourceMappingURL-already-prefixed.js-[a-z0-9]{8}\.map},
+    assert_match %r{//# sourceMappingURL=/assets/sourceMappingURL-already-prefixed-[a-z0-9]{8}\.js\.map},
                  compile_asset(find_asset("sourceMappingURL-already-prefixed.js", fixture_path: "mapped"))
-    assert_match %r{//# sourceMappingURL=/assets/nested/sourceMappingURL-already-prefixed-nested.js-[a-z0-9]{8}\.map},
+    assert_match %r{//# sourceMappingURL=/assets/nested/sourceMappingURL-already-prefixed-nested-[a-z0-9]{8}\.js\.map},
                  compile_asset(find_asset("nested/sourceMappingURL-already-prefixed-nested.js", fixture_path: "mapped"))
   end