diff --git a/.github/scripts/build.sh b/.github/scripts/build.sh
index d2ee85ef1..65216ce4e 100755
--- a/.github/scripts/build.sh
+++ b/.github/scripts/build.sh
@@ -27,7 +27,9 @@ if [[ "$CCACHE" = 1 ]]; then
     ccache -sv
 fi
 
-.github/scripts/binutils/build.sh
+if [[ "$TEST" = 0 ]]; then
+  .github/scripts/binutils/build.sh
+fi
 
 if [[ "$PLATFORM" =~ linux ]]; then
     .github/scripts/toolchain/install-cross-headers-libs.sh
@@ -39,7 +41,7 @@ if [[ "$PLATFORM" =~ cygwin ]]; then
     .github/scripts/toolchain/install-cygwin-headers.sh
 fi
 
-if [[ "$BUILD" != "$TARGET" ]]; then
+if [[ "$BUILD" != "$HOST" && "$TEST" = 0 ]]; then
     .github/scripts/toolchain/build-gcc-stage1.sh
 fi
 
@@ -63,11 +65,13 @@ fi
 
 .github/scripts/toolchain/build-gcc.sh
 
-if [[ "$PLATFORM" =~ (mingw|cygwin) ]]; then
-    .github/scripts/toolchain/build-mingw.sh
-fi
-if [[ "$PLATFORM" =~ cygwin ]]; then
-    .github/scripts/toolchain/build-cygwin.sh 2
+if [[ "$TEST" = 0 ]]; then
+  if [[ "$PLATFORM" =~ (mingw|cygwin) ]]; then
+      .github/scripts/toolchain/build-mingw.sh
+  fi
+  if [[ "$PLATFORM" =~ cygwin ]]; then
+      .github/scripts/toolchain/build-cygwin.sh 2
+  fi
 fi
 
 if [[ "$CCACHE" = 1 ]]; then
diff --git a/.github/scripts/config.sh b/.github/scripts/config.sh
index 0a6184d1c..d56c6feb8 100644
--- a/.github/scripts/config.sh
+++ b/.github/scripts/config.sh
@@ -67,6 +67,7 @@ CCACHE_LIB_DIR=/usr/lib/ccache
 TOOLCHAIN_CCACHE_LIB_DIR=$TOOLCHAIN_PATH/lib/ccache
 
 DEBUG=${DEBUG:-0} # Enable debug build.
+TEST=${TEST:-0} # Enable build for testing.
 CCACHE=${CCACHE:-0} # Enable usage of ccache.
 RUN_BOOTSTRAP=${RUN_BOOTSTRAP:-0} # Bootstrap dependencies during the build.
 UPDATE_SOURCES=${UPDATE_SOURCES:-0} # Update source code repositories.
diff --git a/.github/scripts/install-libraries.sh b/.github/scripts/install-libraries.sh
index d661ed930..edaac8881 100755
--- a/.github/scripts/install-libraries.sh
+++ b/.github/scripts/install-libraries.sh
@@ -9,9 +9,12 @@ echo "::group::Install libraries"
     ./contrib/download_prerequisites
 
     # Symbolic links for binutils dependencies
-    cd $SOURCE_PATH/$BINUTILS_VERSION
-    ln -sf $SOURCE_PATH/$GCC_VERSION/gmp gmp
-    ln -sf $SOURCE_PATH/$GCC_VERSION/mpfr mpfr
+    if [[ "$TEST" = 0 ]]; then
+        cd $SOURCE_PATH/$BINUTILS_VERSION
+        ln -sf $SOURCE_PATH/$GCC_VERSION/gmp gmp
+        ln -sf $SOURCE_PATH/$GCC_VERSION/mpfr mpfr
+        ln -sf $SOURCE_PATH/$GCC_VERSION/isl isl
+    fi
 
 echo "::endgroup::"
 
diff --git a/.github/scripts/update-sources.sh b/.github/scripts/update-sources.sh
index c62be67e8..560a63dc4 100755
--- a/.github/scripts/update-sources.sh
+++ b/.github/scripts/update-sources.sh
@@ -30,7 +30,9 @@ echo "::group::Update source code repositories"
     mkdir -p "$SOURCE_PATH"
 
     cd "$SOURCE_PATH"
-    update_repository "$BINUTILS_VERSION" https://github.com/Windows-on-ARM-Experiments/binutils-woarm64.git woarm64
+    if [[ "$TEST" = 0 ]]; then
+        update_repository "$BINUTILS_VERSION" https://github.com/Windows-on-ARM-Experiments/binutils-woarm64.git woarm64
+    fi
     update_repository "$GCC_VERSION" https://github.com/Windows-on-ARM-Experiments/gcc-woarm64.git woarm64
     update_repository "$MINGW_VERSION" https://github.com/Windows-on-ARM-Experiments/mingw-woarm64.git woarm64
     if [[ "$PLATFORM" =~ cygwin ]]; then 
diff --git a/.github/workflows/build-and-test-toolchain.yml b/.github/workflows/build-and-test-toolchain.yml
index b1889ea31..eb81940a6 100644
--- a/.github/workflows/build-and-test-toolchain.yml
+++ b/.github/workflows/build-and-test-toolchain.yml
@@ -1,6 +1,7 @@
 name: Build toolchain
 
 on:
+  pull_request:
   workflow_dispatch:
     inputs:
       binutils_branch:
@@ -68,6 +69,7 @@ env:
   DOWNLOADS_PATH: /root/downloads
   ARTIFACT_PATH: /root/artifacts
   
+  TEST: 1
   RUN_BOOTSTRAP: 1
 
 jobs:
@@ -76,7 +78,7 @@ jobs:
     runs-on: windows-latest
 
     env:
-      WSLENV: BINUTILS_REPO:BINUTILS_BRANCH:BINUTILS_VERSION:GCC_REPO:GCC_BRANCH:GCC_VERSION:MINGW_REPO:MINGW_BRANCH:MINGW_VERSION:ARCH:PLATFORM:CRT:SOURCE_PATH:DOWNLOADS_PATH:ARTIFACT_PATH:RUN_BOOTSTRAP
+      WSLENV: BINUTILS_REPO:BINUTILS_BRANCH:BINUTILS_VERSION:GCC_REPO:GCC_BRANCH:GCC_VERSION:MINGW_REPO:MINGW_BRANCH:MINGW_VERSION:ARCH:PLATFORM:CRT:SOURCE_PATH:DOWNLOADS_PATH:ARTIFACT_PATH:TEST:RUN_BOOTSTRAP
 
     defaults:
       run: