diff --git a/engines/sci/resource/resource.cpp b/engines/sci/resource/resource.cpp
index d9f8a9728d4..eef3f9ea67c 100644
--- a/engines/sci/resource/resource.cpp
+++ b/engines/sci/resource/resource.cpp
@@ -267,7 +267,6 @@ ResourceSource::~ResourceSource() {
 MacResourceForkResourceSource::MacResourceForkResourceSource(const Common::String &name, int volNum)
  : ResourceSource(kSourceMacResourceFork, name, volNum) {
 	_macResMan = new Common::MacResManager();
-	assert(_macResMan);
 }
 
 MacResourceForkResourceSource::~MacResourceForkResourceSource() {
diff --git a/engines/sci/resource/resource_patcher.cpp b/engines/sci/resource/resource_patcher.cpp
index 63d3f974a92..ad16e5f84ba 100644
--- a/engines/sci/resource/resource_patcher.cpp
+++ b/engines/sci/resource/resource_patcher.cpp
@@ -577,7 +577,6 @@ void ResourcePatcher::patchResource(Resource &resource, const GameResourcePatch
 		assert(newSize > 0);
 
 		target = new byte[newSize];
-		assert(target);
 
 		oldData = resource._data;
 		resource._data = target;
diff --git a/engines/sci/sci.cpp b/engines/sci/sci.cpp
index 58f0b349263..150cc676d71 100644
--- a/engines/sci/sci.cpp
+++ b/engines/sci/sci.cpp
@@ -258,7 +258,6 @@ extern int showScummVMDialog(const Common::U32String &message, const Common::U32
 
 Common::Error SciEngine::run() {
 	_resMan = new ResourceManager();
-	assert(_resMan);
 	_resMan->addAppropriateSources();
 	_resMan->init();
 
diff --git a/engines/sci/sound/drivers/cms.cpp b/engines/sci/sound/drivers/cms.cpp
index f7347616ccf..b7004cd0737 100644
--- a/engines/sci/sound/drivers/cms.cpp
+++ b/engines/sci/sound/drivers/cms.cpp
@@ -768,7 +768,6 @@ int MidiDriver_CMS::open() {
 
 	_rate = _mixer->getOutputRate();
 	_cms = new CMSEmulator(_rate);
-	assert(_cms);
 
 	for (uint i = 0; i < ARRAYSIZE(_channel); ++i)
 		_channel[i] = Channel();