diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 59496a72..ed23c821 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -392,8 +392,7 @@ jobs:
             -DLIBCXXABI_USE_COMPILER_RT=YES `
             -DLIBUNWIND_USE_COMPILER_RT=YES `
             -DLIBCXXABI_USE_LLVM_UNWINDER=YES `
-            -DLIBCXX_EXTRA_SITE_DEFINES="__USE_MINGW_ANSI_STDIO=1;TEST_IS_EXECUTED_IN_A_SLOW_ENVIRONMENT" `
-            -DLIBCXX_TEST_PARAMS="large_tests=False" `
+            -DLIBCXX_EXTRA_SITE_DEFINES="__USE_MINGW_ANSI_STDIO=1" `
             -DLLVM_LIT_ARGS="-v --time-tests"
           ninja
           ninja check-cxx check-cxxabi check-unwind
diff --git a/.github/workflows/test-libcxx.yml b/.github/workflows/test-libcxx.yml
index 79b87f56..acdd3108 100644
--- a/.github/workflows/test-libcxx.yml
+++ b/.github/workflows/test-libcxx.yml
@@ -95,8 +95,7 @@ jobs:
             -DLIBCXXABI_USE_COMPILER_RT=YES `
             -DLIBUNWIND_USE_COMPILER_RT=YES `
             -DLIBCXXABI_USE_LLVM_UNWINDER=YES `
-            -DLIBCXX_EXTRA_SITE_DEFINES="__USE_MINGW_ANSI_STDIO=1;TEST_IS_EXECUTED_IN_A_SLOW_ENVIRONMENT" `
-            -DLIBCXX_TEST_PARAMS="large_tests=False" `
+            -DLIBCXX_EXTRA_SITE_DEFINES="__USE_MINGW_ANSI_STDIO=1" `
             -DLLVM_LIT_ARGS="-v --time-tests"
           ninja
           ninja check-cxx check-cxxabi check-unwind