diff --git a/src/analysis/processing/qgsmetadataalgorithms.cpp b/src/analysis/processing/qgsmetadataalgorithms.cpp
index e9798162b7d1..628148e8644b 100644
--- a/src/analysis/processing/qgsmetadataalgorithms.cpp
+++ b/src/analysis/processing/qgsmetadataalgorithms.cpp
@@ -46,7 +46,7 @@ QString QgsCopyLayerMetadataAlgorithm::groupId() const
 
 QString QgsCopyLayerMetadataAlgorithm::shortHelpString() const
 {
-  return QObject::tr( "Copies metadata from an input layer to a target layer.\n\nAny existing metadata in the target layer will be replaced." );
+  return QObject::tr( "Copies metadata from an source layer to a target layer.\n\nAny existing metadata in the target layer will be replaced." );
 }
 
 QgsCopyLayerMetadataAlgorithm *QgsCopyLayerMetadataAlgorithm::createInstance() const
@@ -56,7 +56,7 @@ QgsCopyLayerMetadataAlgorithm *QgsCopyLayerMetadataAlgorithm::createInstance() c
 
 void QgsCopyLayerMetadataAlgorithm::initAlgorithm( const QVariantMap & )
 {
-  addParameter( new QgsProcessingParameterMapLayer( QStringLiteral( "INPUT" ), QObject::tr( "Source layer" ) ) );
+  addParameter( new QgsProcessingParameterMapLayer( QStringLiteral( "SOURCE" ), QObject::tr( "Source layer" ) ) );
   addParameter( new QgsProcessingParameterMapLayer( QStringLiteral( "TARGET" ), QObject::tr( "Target layer" ) ) );
   addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "DEFAULT" ), QObject::tr( "Save metadata as default" ), false ) );
   addOutput( new QgsProcessingOutputMapLayer( QStringLiteral( "OUTPUT" ), QObject::tr( "Updated layer" ) ) );
@@ -64,19 +64,19 @@ void QgsCopyLayerMetadataAlgorithm::initAlgorithm( const QVariantMap & )
 
 bool QgsCopyLayerMetadataAlgorithm::prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback * )
 {
-  QgsMapLayer *inputLayer = parameterAsLayer( parameters, QStringLiteral( "INPUT" ), context );
+  QgsMapLayer *sourceLayer = parameterAsLayer( parameters, QStringLiteral( "SOURCE" ), context );
   QgsMapLayer *targetLayer = parameterAsLayer( parameters, QStringLiteral( "TARGET" ), context );
   const bool saveAsDefault = parameterAsBool( parameters, QStringLiteral( "DEFAULT" ), context );
 
-  if ( !inputLayer )
-    throw QgsProcessingException( QObject::tr( "Invalid input layer" ) );
+  if ( !sourceLayer )
+    throw QgsProcessingException( QObject::tr( "Invalid source layer" ) );
 
   if ( !targetLayer )
     throw QgsProcessingException( QObject::tr( "Invalid target layer" ) );
 
   mLayerId = targetLayer->id();
 
-  targetLayer->setMetadata( inputLayer->metadata() );
+  targetLayer->setMetadata( sourceLayer->metadata() );
   if ( saveAsDefault )
   {
     bool ok;
@@ -348,7 +348,7 @@ QString QgsUpdateLayerMetadataAlgorithm::groupId() const
 
 QString QgsUpdateLayerMetadataAlgorithm::shortHelpString() const
 {
-  return QObject::tr( "Copies all non-empty metadata fields from an input layer to a target layer.\n\nLeaves empty input fields unchaged in the target." );
+  return QObject::tr( "Copies all non-empty metadata fields from an source layer to a target layer.\n\nLeaves empty input fields unchanged in the target." );
 }
 
 QgsUpdateLayerMetadataAlgorithm *QgsUpdateLayerMetadataAlgorithm::createInstance() const
@@ -358,18 +358,18 @@ QgsUpdateLayerMetadataAlgorithm *QgsUpdateLayerMetadataAlgorithm::createInstance
 
 void QgsUpdateLayerMetadataAlgorithm::initAlgorithm( const QVariantMap & )
 {
-  addParameter( new QgsProcessingParameterMapLayer( QStringLiteral( "INPUT" ), QObject::tr( "Source layer" ) ) );
+  addParameter( new QgsProcessingParameterMapLayer( QStringLiteral( "SOURCE" ), QObject::tr( "Source layer" ) ) );
   addParameter( new QgsProcessingParameterMapLayer( QStringLiteral( "TARGET" ), QObject::tr( "Target layer" ) ) );
   addOutput( new QgsProcessingOutputMapLayer( QStringLiteral( "OUTPUT" ), QObject::tr( "Updated layer" ) ) );
 }
 
 bool QgsUpdateLayerMetadataAlgorithm::prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback * )
 {
-  QgsMapLayer *inputLayer = parameterAsLayer( parameters, QStringLiteral( "INPUT" ), context );
+  QgsMapLayer *sourceLayer = parameterAsLayer( parameters, QStringLiteral( "SOURCE" ), context );
   QgsMapLayer *targetLayer = parameterAsLayer( parameters, QStringLiteral( "TARGET" ), context );
 
-  if ( !inputLayer )
-    throw QgsProcessingException( QObject::tr( "Invalid input layer" ) );
+  if ( !sourceLayer )
+    throw QgsProcessingException( QObject::tr( "Invalid source layer" ) );
 
   if ( !targetLayer )
     throw QgsProcessingException( QObject::tr( "Invalid target layer" ) );
@@ -377,7 +377,7 @@ bool QgsUpdateLayerMetadataAlgorithm::prepareAlgorithm( const QVariantMap &param
   mLayerId = targetLayer->id();
 
   std::unique_ptr<QgsLayerMetadata> md( targetLayer->metadata().clone() );
-  md->combine( &inputLayer->metadata() );
+  md->combine( &sourceLayer->metadata() );
   targetLayer->setMetadata( *md.get() );
 
   return true;
diff --git a/tests/src/analysis/testqgsprocessingalgspt2.cpp b/tests/src/analysis/testqgsprocessingalgspt2.cpp
index ce32ba563dc3..a9c5271ff5f8 100644
--- a/tests/src/analysis/testqgsprocessingalgspt2.cpp
+++ b/tests/src/analysis/testqgsprocessingalgspt2.cpp
@@ -1885,8 +1885,8 @@ void TestQgsProcessingAlgsPt2::generateElevationProfileImage()
 
 void TestQgsProcessingAlgsPt2::copyMetadata()
 {
-  std::unique_ptr<QgsVectorLayer> inputLayer = std::make_unique<QgsVectorLayer>( QStringLiteral( "Point?crs=epsg:4326&field=pk:int&field=col1:string" ), QStringLiteral( "input" ), QStringLiteral( "memory" ) );
-  QVERIFY( inputLayer->isValid() );
+  std::unique_ptr<QgsVectorLayer> sourceLayer = std::make_unique<QgsVectorLayer>( QStringLiteral( "Point?crs=epsg:4326&field=pk:int&field=col1:string" ), QStringLiteral( "input" ), QStringLiteral( "memory" ) );
+  QVERIFY( sourceLayer->isValid() );
 
   std::unique_ptr<QgsVectorLayer> targetLayer = std::make_unique<QgsVectorLayer>( QStringLiteral( "Point?crs=epsg:4326&field=pk:int&field=col1:string" ), QStringLiteral( "target" ), QStringLiteral( "memory" ) );
   QVERIFY( targetLayer->isValid() );
@@ -1894,13 +1894,13 @@ void TestQgsProcessingAlgsPt2::copyMetadata()
   QgsLayerMetadata md;
   md.setTitle( QStringLiteral( "Title" ) );
   md.setAbstract( QStringLiteral( "Abstract" ) );
-  inputLayer->setMetadata( md );
+  sourceLayer->setMetadata( md );
 
   std::unique_ptr<QgsProcessingAlgorithm> alg( QgsApplication::processingRegistry()->createAlgorithmById( QStringLiteral( "native:copylayermetadata" ) ) );
   QVERIFY( alg != nullptr );
 
   QVariantMap parameters;
-  parameters.insert( QStringLiteral( "INPUT" ), QVariant::fromValue( inputLayer.get() ) );
+  parameters.insert( QStringLiteral( "SOURCE" ), QVariant::fromValue( sourceLayer.get() ) );
   parameters.insert( QStringLiteral( "TARGET" ), QVariant::fromValue( targetLayer.get() ) );
 
   bool ok = false;
@@ -2037,8 +2037,8 @@ void TestQgsProcessingAlgsPt2::addHistoryMetadata()
 
 void TestQgsProcessingAlgsPt2::updateMetadata()
 {
-  std::unique_ptr<QgsVectorLayer> inputLayer = std::make_unique<QgsVectorLayer>( QStringLiteral( "Point?crs=epsg:4326&field=pk:int&field=col1:string" ), QStringLiteral( "input" ), QStringLiteral( "memory" ) );
-  QVERIFY( inputLayer->isValid() );
+  std::unique_ptr<QgsVectorLayer> sourceLayer = std::make_unique<QgsVectorLayer>( QStringLiteral( "Point?crs=epsg:4326&field=pk:int&field=col1:string" ), QStringLiteral( "input" ), QStringLiteral( "memory" ) );
+  QVERIFY( sourceLayer->isValid() );
 
   std::unique_ptr<QgsVectorLayer> targetLayer = std::make_unique<QgsVectorLayer>( QStringLiteral( "Point?crs=epsg:4326&field=pk:int&field=col1:string" ), QStringLiteral( "target" ), QStringLiteral( "memory" ) );
   QVERIFY( targetLayer->isValid() );
@@ -2047,7 +2047,7 @@ void TestQgsProcessingAlgsPt2::updateMetadata()
   mdInput.setTitle( QStringLiteral( "New title" ) );
   mdInput.setAbstract( QStringLiteral( "New abstract" ) );
   mdInput.setLanguage( QStringLiteral( "Language" ) );
-  inputLayer->setMetadata( mdInput );
+  sourceLayer->setMetadata( mdInput );
 
   QgsLayerMetadata mdTarget;
   mdTarget.setTitle( QStringLiteral( "Title" ) );
@@ -2059,7 +2059,7 @@ void TestQgsProcessingAlgsPt2::updateMetadata()
   QVERIFY( alg != nullptr );
 
   QVariantMap parameters;
-  parameters.insert( QStringLiteral( "INPUT" ), QVariant::fromValue( inputLayer.get() ) );
+  parameters.insert( QStringLiteral( "SOURCE" ), QVariant::fromValue( sourceLayer.get() ) );
   parameters.insert( QStringLiteral( "TARGET" ), QVariant::fromValue( targetLayer.get() ) );
 
   bool ok = false;