diff --git a/Common/System/Request.h b/Common/System/Request.h
index 173da797fb..3f7d1c0bc1 100644
--- a/Common/System/Request.h
+++ b/Common/System/Request.h
@@ -142,6 +142,14 @@ inline void System_SetWindowTitle(const std::string &param) {
 	g_requestManager.MakeSystemRequest(SystemRequestType::SET_WINDOW_TITLE, nullptr, nullptr, param, "", 0);
 }
 
+inline void System_SendDebugOutput(const std::string &string) {
+	g_requestManager.MakeSystemRequest(SystemRequestType::SEND_DEBUG_OUTPUT, nullptr, nullptr, string, "", 0);
+}
+
+inline void System_SendDebugScreenshot(const std::string &data, int height) {
+	g_requestManager.MakeSystemRequest(SystemRequestType::SEND_DEBUG_SCREENSHOT, nullptr, nullptr, data, "", height);
+}
+
 // Non-inline to avoid including Path.h
 void System_CreateGameShortcut(const Path &path, const std::string &title);
 
diff --git a/Common/System/System.h b/Common/System/System.h
index 8148d099e7..8deb078966 100644
--- a/Common/System/System.h
+++ b/Common/System/System.h
@@ -70,6 +70,11 @@ enum class SystemRequestType {
 	GRAPHICS_BACKEND_FAILED_ALERT,
 	CREATE_GAME_SHORTCUT,
 
+	// Commonly ignored, used when automated tests generate output.
+	SEND_DEBUG_OUTPUT,
+	// Note: height specified as param3, width based on param1.size() / param3.
+	SEND_DEBUG_SCREENSHOT,
+
 	NOTIFY_UI_STATE,  // Used on Android only. Not a SystemNotification since it takes a parameter.
 
 	// High-level hardware control
diff --git a/Core/HLE/sceIo.cpp b/Core/HLE/sceIo.cpp
index e02f9e1620..55766694f0 100644
--- a/Core/HLE/sceIo.cpp
+++ b/Core/HLE/sceIo.cpp
@@ -29,6 +29,7 @@
 #include "Common/Serialize/SerializeMap.h"
 #include "Common/Serialize/SerializeSet.h"
 #include "Common/StringUtils.h"
+#include "Common/System/Request.h"
 #include "Core/Core.h"
 #include "Core/Config.h"
 #include "Core/ConfigValues.h"
@@ -37,7 +38,6 @@
 #include "Core/MemMapHelpers.h"
 #include "Core/System.h"
 #include "Core/HDRemaster.h"
-#include "Core/Host.h"
 #include "Core/SaveState.h"
 #include "Core/HLE/HLE.h"
 #include "Core/HLE/HLEHelperThread.h"
@@ -2012,8 +2012,8 @@ static u32 sceIoDevctl(const char *name, int cmd, u32 argAddr, int argLen, u32 o
 		case EMULATOR_DEVCTL__SEND_OUTPUT:
 			{
 				std::string data(Memory::GetCharPointer(argAddr), argLen);
-				if (PSP_CoreParameter().printfEmuLog && host) {
-					host->SendDebugOutput(data);
+				if (PSP_CoreParameter().printfEmuLog) {
+					System_SendDebugOutput(data);
 				} else {
 					if (PSP_CoreParameter().collectEmuLog) {
 						*PSP_CoreParameter().collectEmuLog += data;
@@ -2040,9 +2040,7 @@ static u32 sceIoDevctl(const char *name, int cmd, u32 argAddr, int argLen, u32 o
 
 			__DisplayGetFramebuf(&topaddr, &linesize, nullptr, 0);
 			// TODO: Convert based on pixel format / mode / something?
-			if (host) {
-				host->SendDebugScreenshot(topaddr, linesize, 272);
-			}
+			System_SendDebugScreenshot(std::string((const char *)&topaddr[0], linesize * 272), 272);
 			return 0;
 		}
 		case EMULATOR_DEVCTL__TOGGLE_FASTFORWARD:
diff --git a/Core/HLE/sceKernelModule.cpp b/Core/HLE/sceKernelModule.cpp
index 4d2d5a61ba..92db2b4efe 100644
--- a/Core/HLE/sceKernelModule.cpp
+++ b/Core/HLE/sceKernelModule.cpp
@@ -26,6 +26,7 @@
 #include "Common/Serialize/SerializeSet.h"
 #include "Common/File/FileUtil.h"
 #include "Common/StringUtils.h"
+#include "Common/System/Request.h"
 #include "Common/System/System.h"
 
 #include "Core/Config.h"
@@ -37,7 +38,6 @@
 #include "Core/HLE/ReplaceTables.h"
 #include "Core/HLE/sceDisplay.h"
 #include "Core/Reporting.h"
-#include "Core/Host.h"
 #include "Core/Loaders.h"
 #include "Core/MIPS/MIPS.h"
 #include "Core/MIPS/MIPSAnalyst.h"
@@ -1934,9 +1934,7 @@ void __KernelGPUReplay() {
 		PSPPointer<u8> topaddr;
 		u32 linesize = 512;
 		__DisplayGetFramebuf(&topaddr, &linesize, nullptr, 0);
-		if (host) {
-			host->SendDebugScreenshot(topaddr, linesize, 272);
-		}
+		System_SendDebugScreenshot(std::string((const char *)&topaddr[0], linesize * 272), 272);
 		Core_Stop();
 	}
 }
diff --git a/headless/Headless.cpp b/headless/Headless.cpp
index 12dbb9c456..990417f97b 100644
--- a/headless/Headless.cpp
+++ b/headless/Headless.cpp
@@ -14,6 +14,7 @@
 
 #include "Common/Profiler/Profiler.h"
 #include "Common/System/NativeApp.h"
+#include "Common/System/Request.h"
 #include "Common/System/System.h"
 
 #include "Common/CommonWindows.h"
@@ -117,7 +118,17 @@ bool System_GetPropertyBool(SystemProperty prop) {
 void System_Notify(SystemNotification notification) {}
 void System_PostUIMessage(const std::string &message, const std::string &param) {}
 void System_NotifyUserMessage(const std::string &message, float duration, u32 color, const char *id) {}
-bool System_MakeRequest(SystemRequestType type, int requestId, const std::string &param1, const std::string &param2, int param3) { return false; }
+bool System_MakeRequest(SystemRequestType type, int requestId, const std::string &param1, const std::string &param2, int param3) {
+	switch (type) {
+	case SystemRequestType::SEND_DEBUG_OUTPUT:
+		host->SendDebugOutput(param1);
+		return true;
+	case SystemRequestType::SEND_DEBUG_SCREENSHOT:
+		host->SendDebugScreenshot((const u8 *)param1.data(), (uint32_t)(param1.size() / param3), param3);
+		return true;
+	}
+	return false;
+}
 void System_InputBoxGetString(const std::string &title, const std::string &defaultValue, std::function<void(bool, const std::string &)> cb) { cb(false, ""); }
 void System_AskForPermission(SystemPermission permission) {}
 PermissionStatus System_GetPermissionStatus(SystemPermission permission) { return PERMISSION_STATUS_GRANTED; }
@@ -238,7 +249,7 @@ bool RunAutoTest(HeadlessHost *headlessHost, CoreParameter &coreParameter, const
 			if (!opt.bench) {
 				printf("%s", output.c_str());
 
-				host->SendDebugOutput("TIMEOUT\n");
+				System_SendDebugOutput("TIMEOUT\n");
 				TeamCityPrint("testFailed name='%s' message='Test timeout'", currentTestName.c_str());
 				GitHubActionsPrint("error", "Test timeout for %s", currentTestName.c_str());
 			}