diff --git a/DEPS b/DEPS
index fb636a9..1347039 100644
--- a/DEPS
+++ b/DEPS
@@ -14,7 +14,7 @@
   'gmock_revision': '29763965ab52f24565299976b936d1265cb6a271',
   'gtest_revision': '8245545b6dc9c4703e6496d1efd19e975ad2b038',
   'icu_revision': 'a5f86adbb0a58d04c035a5d1228747b1823cd485',
-  'pdfium_tests_revision': '62d61d99f65f4a9ce266ca0ecf74bc098d397fd3',
+  'pdfium_tests_revision': 'b63db0698bd3cac932807eb552e565b89dd2df9d',
   'skia_revision': '7d46f4af7dc759002537a172af121f2bfe200981',
   'tools_memory_revision': '427f10475e1a8d72424c29d00bf689122b738e5d',
   'trace_event_revision': '54b8455be9505c2cb0cf5c26bb86739c236471aa',
diff --git a/core/fpdfdoc/cpvt_generateap.cpp b/core/fpdfdoc/cpvt_generateap.cpp
index 56b6612..13ef506 100644
--- a/core/fpdfdoc/cpvt_generateap.cpp
+++ b/core/fpdfdoc/cpvt_generateap.cpp
@@ -538,8 +538,11 @@
 
   CPDF_Dictionary* pGSDict = new CPDF_Dictionary;
   pGSDict->SetAtString("Type", "ExtGState");
-  pGSDict->SetAtNumber("ca", 1);
-  pGSDict->SetAtNumber("CA", 1);
+
+  FX_FLOAT fOpacity =
+      pAnnotDict->KeyExist("CA") ? pAnnotDict->GetNumberBy("CA") : 1;
+  pGSDict->SetAtNumber("ca", fOpacity);
+  pGSDict->SetAtNumber("CA", fOpacity);
   pGSDict->SetAtBoolean("AIS", false);
   pGSDict->SetAtString("BM", "Multiply");