diff --git a/docs/Regres.md b/docs/Regres.md
index 2f3f900..abe5d93 100644
--- a/docs/Regres.md
+++ b/docs/Regres.md
@@ -195,6 +195,21 @@
 dEQP used are dictated by the change being tested, and so both used as part of
 the cache key.
 
+### Vulkan Loader usage
+
+Applications make use of the Vulkan API by loading the [Vulkan Loader](https://github.com/KhronosGroup/Vulkan-Loader)
+library (`libvulkan.so.1` on Linux), which enumerates available Vulkan
+implementations (typically GPUs and their drivers) before an actual 'instance'
+is created to communicate with a specific Installable Client Driver (ICD).
+
+However, SwiftShader can build into libvulkan.so.1 itself, which implements the
+same API entry functions as the Vulkan Loader. Regres by default will make dEQP
+load this SwiftShader library instead of the system's Vulkan Loader. It ensures
+test results are independent of the system's Vulkan setup.
+
+To override this, one can set LD_LIBRARY_PATH to point to the location of a
+Loader's libvulkan.so.1.
+
 ### Code coverage
 
 The [daily run](#daily-run-continuous-integration-testing) produces code
diff --git a/tests/regres/cmd/regres/main.go b/tests/regres/cmd/regres/main.go
index fc56cfb..e2be34f 100644
--- a/tests/regres/cmd/regres/main.go
+++ b/tests/regres/cmd/regres/main.go
@@ -1166,6 +1166,10 @@
 	tempDir := filepath.Join(t.buildDir, "temp")
 	os.MkdirAll(tempDir, 0777)
 
+	// Path to SwiftShader's libvulkan.so.1, which can be loaded directly by
+	// dEQP without use of the Vulkan Loader.
+	swiftshaderLibvulkanPath := filepath.Join(t.buildDir, "Linux")
+
 	config := deqp.Config{
 		ExeEgl:    filepath.Join(d.path, "build", "modules", "egl", "deqp-egl"),
 		ExeGles2:  filepath.Join(d.path, "build", "modules", "gles2", "deqp-gles2"),
@@ -1174,7 +1178,7 @@
 		TempDir:   tempDir,
 		TestLists: testLists,
 		Env: []string{
-			"LD_LIBRARY_PATH=" + t.buildDir + ":" + os.Getenv("LD_LIBRARY_PATH"),
+			"LD_LIBRARY_PATH=" + os.Getenv("LD_LIBRARY_PATH") + ":" + swiftshaderLibvulkanPath,
 			"VK_ICD_FILENAMES=" + swiftshaderICDJSON,
 			"DISPLAY=" + os.Getenv("DISPLAY"),
 			"LIBC_FATAL_STDERR_=1", // Put libc explosions into logs.