diff --git a/tests/kokoro/gcp_windows/continuous.bat b/tests/kokoro/gcp_windows/continuous.bat
index 3bd632c..a2ddc4a 100644
--- a/tests/kokoro/gcp_windows/continuous.bat
+++ b/tests/kokoro/gcp_windows/continuous.bat
@@ -19,7 +19,7 @@
 cmake --version
 
 cmake .. ^
-    -G "Visual Studio 15 2017 Win64" ^
+    -G "%CMAKE_GENERATOR_TYPE%" ^
     -Thost=x64 ^
     "-DCMAKE_BUILD_TYPE=%BUILD_TYPE%" ^
     "-DREACTOR_BACKEND=%REACTOR_BACKEND%" ^
diff --git a/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug/continuous.cfg b/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug/continuous.cfg
index dcfdd80..40cdf0e 100644
--- a/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug/continuous.cfg
+++ b/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug/continuous.cfg
@@ -17,3 +17,8 @@
   key: "BUILD_TYPE"
   value: "Debug"
 }
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017 Win64"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug/presubmit.cfg b/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug/presubmit.cfg
index dcfdd80..40cdf0e 100644
--- a/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug/presubmit.cfg
+++ b/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug/presubmit.cfg
@@ -17,3 +17,8 @@
   key: "BUILD_TYPE"
   value: "Debug"
 }
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017 Win64"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug_x86/continuous.cfg b/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug_x86/continuous.cfg
new file mode 100644
index 0000000..2ca8ec9
--- /dev/null
+++ b/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug_x86/continuous.cfg
@@ -0,0 +1,24 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Location of the continuous script in Git.
+build_file: "SwiftShader/tests/kokoro/gcp_windows/continuous.bat"
+
+env_vars {
+  key: "REACTOR_BACKEND"
+  value: "LLVM"
+}
+
+env_vars {
+  key: "LLVM_VERSION"
+  value: "10.0"
+}
+
+env_vars {
+  key: "BUILD_TYPE"
+  value: "Debug"
+}
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug_x86/presubmit.cfg b/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug_x86/presubmit.cfg
new file mode 100644
index 0000000..2ca8ec9
--- /dev/null
+++ b/tests/kokoro/gcp_windows/reactor_llvm/10.0/debug_x86/presubmit.cfg
@@ -0,0 +1,24 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Location of the continuous script in Git.
+build_file: "SwiftShader/tests/kokoro/gcp_windows/continuous.bat"
+
+env_vars {
+  key: "REACTOR_BACKEND"
+  value: "LLVM"
+}
+
+env_vars {
+  key: "LLVM_VERSION"
+  value: "10.0"
+}
+
+env_vars {
+  key: "BUILD_TYPE"
+  value: "Debug"
+}
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_llvm/10.0/release/continuous.cfg b/tests/kokoro/gcp_windows/reactor_llvm/10.0/release/continuous.cfg
index 3302963..ded9b83 100644
--- a/tests/kokoro/gcp_windows/reactor_llvm/10.0/release/continuous.cfg
+++ b/tests/kokoro/gcp_windows/reactor_llvm/10.0/release/continuous.cfg
@@ -17,3 +17,8 @@
   key: "BUILD_TYPE"
   value: "RelWithDebInfo"
 }
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017 Win64"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_llvm/10.0/release/presubmit.cfg b/tests/kokoro/gcp_windows/reactor_llvm/10.0/release/presubmit.cfg
index 3302963..ded9b83 100644
--- a/tests/kokoro/gcp_windows/reactor_llvm/10.0/release/presubmit.cfg
+++ b/tests/kokoro/gcp_windows/reactor_llvm/10.0/release/presubmit.cfg
@@ -17,3 +17,8 @@
   key: "BUILD_TYPE"
   value: "RelWithDebInfo"
 }
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017 Win64"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_subzero/debug/continuous.cfg b/tests/kokoro/gcp_windows/reactor_subzero/debug/continuous.cfg
index 33abaa4..e632fcb 100644
--- a/tests/kokoro/gcp_windows/reactor_subzero/debug/continuous.cfg
+++ b/tests/kokoro/gcp_windows/reactor_subzero/debug/continuous.cfg
@@ -17,3 +17,8 @@
   key: "BUILD_TYPE"
   value: "Debug"
 }
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017 Win64"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_subzero/debug/presubmit.cfg b/tests/kokoro/gcp_windows/reactor_subzero/debug/presubmit.cfg
index 33abaa4..e632fcb 100644
--- a/tests/kokoro/gcp_windows/reactor_subzero/debug/presubmit.cfg
+++ b/tests/kokoro/gcp_windows/reactor_subzero/debug/presubmit.cfg
@@ -17,3 +17,8 @@
   key: "BUILD_TYPE"
   value: "Debug"
 }
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017 Win64"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_subzero/debug_x86/continuous.cfg b/tests/kokoro/gcp_windows/reactor_subzero/debug_x86/continuous.cfg
new file mode 100644
index 0000000..f479edd
--- /dev/null
+++ b/tests/kokoro/gcp_windows/reactor_subzero/debug_x86/continuous.cfg
@@ -0,0 +1,24 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Location of the continuous script in Git.
+build_file: "SwiftShader/tests/kokoro/gcp_windows/continuous.bat"
+
+env_vars {
+  key: "REACTOR_BACKEND"
+  value: "Subzero"
+}
+
+env_vars {
+  key: "LLVM_VERSION"
+  value: "10.0"
+}
+
+env_vars {
+  key: "BUILD_TYPE"
+  value: "Debug"
+}
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_subzero/debug_x86/presubmit.cfg b/tests/kokoro/gcp_windows/reactor_subzero/debug_x86/presubmit.cfg
new file mode 100644
index 0000000..f479edd
--- /dev/null
+++ b/tests/kokoro/gcp_windows/reactor_subzero/debug_x86/presubmit.cfg
@@ -0,0 +1,24 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Location of the continuous script in Git.
+build_file: "SwiftShader/tests/kokoro/gcp_windows/continuous.bat"
+
+env_vars {
+  key: "REACTOR_BACKEND"
+  value: "Subzero"
+}
+
+env_vars {
+  key: "LLVM_VERSION"
+  value: "10.0"
+}
+
+env_vars {
+  key: "BUILD_TYPE"
+  value: "Debug"
+}
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_subzero/release/continuous.cfg b/tests/kokoro/gcp_windows/reactor_subzero/release/continuous.cfg
index fada9fb..38b71c1 100644
--- a/tests/kokoro/gcp_windows/reactor_subzero/release/continuous.cfg
+++ b/tests/kokoro/gcp_windows/reactor_subzero/release/continuous.cfg
@@ -17,3 +17,8 @@
   key: "BUILD_TYPE"
   value: "RelWithDebInfo"
 }
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017 Win64"
+}
diff --git a/tests/kokoro/gcp_windows/reactor_subzero/release/presubmit.cfg b/tests/kokoro/gcp_windows/reactor_subzero/release/presubmit.cfg
index fada9fb..38b71c1 100644
--- a/tests/kokoro/gcp_windows/reactor_subzero/release/presubmit.cfg
+++ b/tests/kokoro/gcp_windows/reactor_subzero/release/presubmit.cfg
@@ -17,3 +17,8 @@
   key: "BUILD_TYPE"
   value: "RelWithDebInfo"
 }
+
+env_vars {
+  key: "CMAKE_GENERATOR_TYPE"
+  value: "Visual Studio 15 2017 Win64"
+}