diff --git a/.travis.yml b/.travis.yml
index d16d998..14f1a61 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,12 +9,17 @@ d:
   # this way the overall test time gets cut down (GDC/LDC are a lot
   # slower tham DMD, so they should be started early), while still
   # catching most DMD version related build failures early
-  - dmd-2.075.0
+  - dmd-2.077.1
   - dmd-2.071.2
+  - ldc-1.6.0
+  - ldc-1.5.0
+  - ldc-1.4.0
   - ldc-1.3.0
   - ldc-1.2.0
   - ldc-1.1.0
   - dmd-beta
+  - dmd-2.076.1
+  - dmd-2.075.1
   - dmd-2.074.1
   - dmd-2.073.2
   - dmd-2.072.2
diff --git a/README.md b/README.md
index cf3bca7..101f4b0 100644
--- a/README.md
+++ b/README.md
@@ -27,12 +27,16 @@ Supported compilers
 
 The following compilers are tested and supported:
 
-- DMD 2.076.0
+- DMD 2.077.1
+- DMD 2.076.1
 - DMD 2.075.1
 - DMD 2.074.1
 - DMD 2.073.2
 - DMD 2.072.2
 - DMD 2.071.2
+- LDC 1.6.0
+- LDC 1.5.0
+- LDC 1.4.0
 - LDC 1.3.0
 - LDC 1.2.0
 - LDC 1.1.0
diff --git a/appveyor.yml b/appveyor.yml
index 141c4c3..a178668 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -2,19 +2,23 @@ platform: x64
 environment:
  matrix:
   - DC: dmd
-    DVersion: 2.075.0
+    DVersion: 2.077.1
     arch: x64
     config: winapi
   - DC: dmd
-    DVersion: 2.075.0
+    DVersion: 2.077.1
     arch: x86
     config: winapi-optlink
   - DC: dmd
-    DVersion: 2.075.0
+    DVersion: 2.077.1
     arch: x86_mscoff
     config: winapi
   - DC: dmd
-    DVersion: 2.075.0
+    DVersion: 2.076.1
+    arch: x86
+    config: select-optlink
+  - DC: dmd
+    DVersion: 2.075.1
     arch: x86
     config: select-optlink
   - DC: dmd
@@ -33,6 +37,18 @@ environment:
     DVersion: 2.071.1
     arch: x86
     config: winapi-optlink
+  - DC: ldc
+    DVersion: 1.6.0
+    arch: x64
+    config: winapi
+  - DC: ldc
+    DVersion: 1.5.0
+    arch: x86
+    config: winapi
+  - DC: ldc
+    DVersion: 1.4.0
+    arch: x64
+    config: winapi
   - DC: ldc
     DVersion: 1.3.0
     arch: x64
diff --git a/dub.sdl b/dub.sdl
index 2835443..1e0d867 100644
--- a/dub.sdl
+++ b/dub.sdl
@@ -21,7 +21,7 @@ configuration "kqueue" {
 }
 
 configuration "winapi" {
-	platforms "windows-x86_64" "windows-x86_mscoff"
+	platforms "windows-x86_64" "windows-x86_mscoff" "windows-ldc" "windows-gdc"
 	versions "EventcoreWinAPIDriver"
 }
 
diff --git a/tests/0-timer.d b/tests/0-timer.d
index d9564e9..a91d9fc 100644
--- a/tests/0-timer.d
+++ b/tests/0-timer.d
@@ -27,20 +27,20 @@ void main()
 		}
 
 		try {
-			assert(dur > 200.msecs, (dur - 200.msecs).toString());
-			assert(dur < 260.msecs, (dur - 200.msecs).toString());
+			assert(dur > 1200.msecs, (dur - 1200.msecs).toString());
+			assert(dur < 1300.msecs, (dur - 1200.msecs).toString());
 		} catch (Exception e) assert(false, e.msg);
 
 		s_startTime += dur;
 
-		eventDriver.timers.set(tm, 100.msecs, 100.msecs);
+		eventDriver.timers.set(tm, 300.msecs, 300.msecs);
 
 		void secondTier(TimerID timer) nothrow @safe {
 			try {
 				auto dur = Clock.currTime(UTC()) - s_startTime;
 				s_cnt++;
-				assert(dur > 100.msecs * s_cnt, (dur - 100.msecs * s_cnt).toString());
-				assert(dur < 100.msecs * s_cnt + 60.msecs, (dur - 100.msecs * s_cnt).toString());
+				assert(dur > 300.msecs * s_cnt, (dur - 300.msecs * s_cnt).toString());
+				assert(dur < 300.msecs * s_cnt + 100.msecs, (dur - 300.msecs * s_cnt).toString());
 				assert(s_cnt <= 3);
 
 				if (s_cnt == 3) {
@@ -55,7 +55,7 @@ void main()
 		eventDriver.timers.wait(tm, &secondTier);
 	});
 
-	eventDriver.timers.set(tm, 200.msecs, 0.msecs);
+	eventDriver.timers.set(tm, 1200.msecs, 0.msecs);
 
 	ExitReason er;
 	do er = eventDriver.core.processEvents(Duration.max);
diff --git a/tests/issue-25-periodic-timers.d b/tests/issue-25-periodic-timers.d
index a783dc8..20baba1 100644
--- a/tests/issue-25-periodic-timers.d
+++ b/tests/issue-25-periodic-timers.d
@@ -26,30 +26,30 @@ void main()
 			writefln("First timer");
 			auto dur = Clock.currTime(UTC()) - s_startTime;
 
-			assert(dur >= 200.msecs, (dur - 200.msecs).toString());
-			assert(dur < 250.msecs, (dur - 200.msecs).toString());
+			assert(dur >= 1200.msecs, (dur - 1200.msecs).toString());
+			assert(dur < 1300.msecs, (dur - 1200.msecs).toString());
 
 			timer1fired = true;
 		} catch (Exception e) {
 			assert(false, e.msg);
 		}
 	});
-	eventDriver.timers.set(tm, 200.msecs, 0.msecs);
+	eventDriver.timers.set(tm, 1200.msecs, 0.msecs);
 
-	// second timer repeating 100ms, 3 times
+	// second timer repeating 300ms, 5 times
 	auto tm2 = eventDriver.timers.create();
-	eventDriver.timers.set(tm2, 100.msecs, 100.msecs);
+	eventDriver.timers.set(tm2, 300.msecs, 300.msecs);
 	void periodicCallback(TimerID timer) nothrow @safe {
 		try {
 			writefln("Second timer");
 
 			auto dur = Clock.currTime(UTC()) - s_startTime;
 			s_cnt++;
-			assert(dur > 100.msecs * s_cnt, (dur - 100.msecs * s_cnt).toString());
-			assert(dur < 100.msecs * s_cnt + 60.msecs, (dur - 100.msecs * s_cnt).toString());
-			assert(s_cnt <= 3);
+			assert(dur > 300.msecs * s_cnt, (dur - 300.msecs * s_cnt).toString());
+			assert(dur < 300.msecs * s_cnt + 100.msecs, (dur - 300.msecs * s_cnt).toString());
+			assert(s_cnt <= 5);
 
-			if (s_cnt == 3) {
+			if (s_cnt == 5) {
 				s_done = true;
 				eventDriver.timers.stop(timer);
 				assert(timer1fired, "Timer 1 didn't fire within 300ms");