diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76c5ab5..bf4fc7f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,16 @@
+1.9.0 - 2020-
+==================
+
+- Implemented priority based task scheduling - [pull #196][issue196], [pull #197][issue197]
+	- Each task can be given a non-default priority that controls the relative frequency with which the task gets resumed in concurrent situations
+	- Events are now handled according to the calling task's priority instead of being handled immediately (can be reverted by defining a `VibeHighEventPriority` version)
+- Fixeed a bogus contract violation error in `Timer.rearm` - [pull #195][issue195]
+
+[issue195]: https://github.com/vibe-d/vibe-core/issues/195
+[issue196]: https://github.com/vibe-d/vibe-core/issues/196
+[issue197]: https://github.com/vibe-d/vibe-core/issues/197
+
+
 1.8.1 - 2019-12-17
 ==================
 
@@ -9,7 +22,7 @@
 1.8.0 - 2019-12-07
 ==================
 
-- Adds a new path segment API that works without GC allocations (`GenericPath.bySegment2`/`.head2`) - this will replace the old API in version 2.x.x of the library - [pull #179][issue179]
+- Added a new path segment API that works without GC allocations (`GenericPath.bySegment2`/`.head2`) - this will replace the old API in version 2.x.x of the library - [pull #179][issue179]
 - Added `GenericPath.byPrefix` to iterate over all acestor paths from root to leaf - [pull #181][issue181]
 - Fixed a bug with unitialized `YieldLock` instances (which can happen even with `@disable this()`) - [pull #180][issue180]
 - Heavily improved performance of `readFileUTF8` for large files by using a more efficient `sanitizyUTF8` implementation - [pull #182][issue182]
diff --git a/source/vibe/core/core.d b/source/vibe/core/core.d
index e23f61d..5307852 100644
--- a/source/vibe/core/core.d
+++ b/source/vibe/core/core.d
@@ -1507,20 +1507,6 @@ private void setupSignalHandlers()
 // per process setup
 shared static this()
 {
-	version(Windows){
-		version(VibeLibeventDriver) enum need_wsa = true;
-		else version(VibeWin32Driver) enum need_wsa = true;
-		else enum need_wsa = false;
-		static if (need_wsa) {
-			logTrace("init winsock");
-			// initialize WinSock2
-			import core.sys.windows.winsock2;
-			WSADATA data;
-			WSAStartup(0x0202, &data);
-
-		}
-	}
-
 	s_isMainThread = true;
 
 	// COMPILER BUG: Must be some kind of module constructor order issue:
diff --git a/source/vibe/core/net.d b/source/vibe/core/net.d
index 8968cfe..86cc541 100644
--- a/source/vibe/core/net.d
+++ b/source/vibe/core/net.d
@@ -770,8 +770,13 @@ mixin(tracer);
 		switch (res[1]) {
 			default:
 				throw new Exception("Error writing data to socket.");
-			case IOStatus.ok: break;
-			case IOStatus.disconnected: break;
+			case IOStatus.ok:
+				assert(mode != IOMode.all || res[2] == bytes.length);
+				break;
+			case IOStatus.disconnected:
+				if (mode == IOMode.all && res[2] != bytes.length)
+					throw new Exception("Connection closed while writing data.");
+				break;
 		}
 
 		return res[2];
diff --git a/source/vibe/core/sync.d b/source/vibe/core/sync.d
index 6aef38b..f85d436 100644
--- a/source/vibe/core/sync.d
+++ b/source/vibe/core/sync.d
@@ -438,7 +438,6 @@ final class InterruptibleTaskMutex : Lockable {
 	void unlock() nothrow { m_impl.unlock(); }
 }
 
-version (VibeLibevDriver) {} else // timers are not implemented for libev, yet
 unittest {
 	runMutexUnitTests!InterruptibleTaskMutex();
 }
@@ -475,7 +474,6 @@ final class RecursiveTaskMutex : core.sync.mutex.Mutex, Lockable {
 	override void unlock() { m_impl.unlock(); }
 }
 
-version (VibeLibevDriver) {} else // timers are not implemented for libev, yet
 unittest {
 	runMutexUnitTests!RecursiveTaskMutex();
 }
@@ -507,7 +505,6 @@ final class InterruptibleRecursiveTaskMutex : Lockable {
 	void unlock() { m_impl.unlock(); }
 }
 
-version (VibeLibevDriver) {} else // timers are not implemented for libev, yet
 unittest {
 	runMutexUnitTests!InterruptibleRecursiveTaskMutex();
 }
diff --git a/tests/vibe.core.net.1376.d b/tests/vibe.core.net.1376.d
index 2d6529d..d9afb6f 100644
--- a/tests/vibe.core.net.1376.d
+++ b/tests/vibe.core.net.1376.d
@@ -2,7 +2,6 @@
 	name "tests"
 	description "TCP disconnect task issue"
 	dependency "vibe-core" path="../"
-	versions "VibeDefaultMain"
 +/
 module test;
 
@@ -10,7 +9,7 @@ import vibe.core.core;
 import vibe.core.net;
 import core.time : msecs;
 
-shared static this()
+void main()
 {
 	auto l = listenTCP(0, (conn) {
 		auto td = runTask!TCPConnection((conn) {
@@ -39,4 +38,8 @@ shared static this()
 		sleep(50.msecs);
 		exitEventLoop();
 	});
+
+	runApplication();
+
+	l.stopListening();
 }
diff --git a/tests/vibe.core.net.1726.d b/tests/vibe.core.net.1726.d
index 394ebc1..6f0838f 100644
--- a/tests/vibe.core.net.1726.d
+++ b/tests/vibe.core.net.1726.d
@@ -30,7 +30,11 @@ void performTest(bool reverse)
 		auto wt = runTask!TCPConnection((conn) {
 			sleep(reverse ? 100.msecs : 20.msecs); // give the connection time to establish
 			try {
-				conn.write(buf);
+				// write enough to let the connection block long enough to let
+				// the remote end close the connection
+				// NOTE: on Windows, the first write() can actually complete
+				//       immediately, but the second one blocks
+				foreach (i; 0 .. 2) conn.write(buf);
 				assert(false, "Expected write() to throw an exception.");
 			} catch (Exception) {
 				write_ex = true;