diff --git a/pkgs/development/libraries/aws-sdk-cpp/default.nix b/pkgs/development/libraries/aws-sdk-cpp/default.nix
index e1711d4cd59..68ea4412283 100644
--- a/pkgs/development/libraries/aws-sdk-cpp/default.nix
+++ b/pkgs/development/libraries/aws-sdk-cpp/default.nix
@@ -45,6 +45,8 @@ stdenv.mkDerivation rec {
 
     # Flaky on Hydra
     rm tests/aws-cpp-sdk-core-tests/aws/auth/AWSCredentialsProviderTest.cpp
+    rm tests/aws-cpp-sdk-core-tests/aws/client/AWSClientTest.cpp
+    rm tests/aws-cpp-sdk-core-tests/aws/client/AwsConfigTest.cpp
     # Includes aws-c-auth private headers, so only works with submodule build
     rm tests/aws-cpp-sdk-core-tests/aws/auth/AWSAuthSignerTest.cpp
     # TestRandomURLMultiThreaded fails
@@ -88,10 +90,6 @@ stdenv.mkDerivation rec {
     "-Wno-error=deprecated-declarations"
   ];
 
-  # aws-cpp-sdk-core-tests/aws/client/AWSClientTest.cpp
-  # seem to have a datarace
-  enableParallelChecking = false;
-
   postFixupHooks = [
     # This bodge is necessary so that the file that the generated -config.cmake file
     # points to an existing directory.