diff --git a/plugins/org.eclipse.elk.alg.common/src/org/eclipse/elk/alg/common/nodespacing/internal/algorithm/NodeLabelAndSizeUtilities.java b/plugins/org.eclipse.elk.alg.common/src/org/eclipse/elk/alg/common/nodespacing/internal/algorithm/NodeLabelAndSizeUtilities.java
index 9b0f4c38ef..512d5bad21 100644
--- a/plugins/org.eclipse.elk.alg.common/src/org/eclipse/elk/alg/common/nodespacing/internal/algorithm/NodeLabelAndSizeUtilities.java
+++ b/plugins/org.eclipse.elk.alg.common/src/org/eclipse/elk/alg/common/nodespacing/internal/algorithm/NodeLabelAndSizeUtilities.java
@@ -23,8 +23,6 @@
 import org.eclipse.elk.core.options.SizeConstraint;
 import org.eclipse.elk.core.options.SizeOptions;
 import org.eclipse.elk.core.util.ElkUtil;
-import org.eclipse.elk.core.util.adapters.GraphAdapters.LabelAdapter;
-import org.eclipse.elk.core.util.adapters.GraphAdapters.PortAdapter;
 
 /**
  * Various little methods that didn't quite fit into any of the other classes.
diff --git a/plugins/org.eclipse.elk.alg.common/src/org/eclipse/elk/alg/common/nodespacing/internal/algorithm/PortLabelPlacementCalculator.java b/plugins/org.eclipse.elk.alg.common/src/org/eclipse/elk/alg/common/nodespacing/internal/algorithm/PortLabelPlacementCalculator.java
index 6b1015636b..b6f9237df5 100644
--- a/plugins/org.eclipse.elk.alg.common/src/org/eclipse/elk/alg/common/nodespacing/internal/algorithm/PortLabelPlacementCalculator.java
+++ b/plugins/org.eclipse.elk.alg.common/src/org/eclipse/elk/alg/common/nodespacing/internal/algorithm/PortLabelPlacementCalculator.java
@@ -27,7 +27,6 @@
 import org.eclipse.elk.core.options.PortLabelPlacement;
 import org.eclipse.elk.core.options.PortSide;
 import org.eclipse.elk.core.options.SizeConstraint;
-import org.eclipse.elk.core.options.SizeOptions;
 
 /**
  * Knows how to place port labels.
diff --git a/plugins/org.eclipse.elk.alg.force/src/org/eclipse/elk/alg/force/graph/FNode.java b/plugins/org.eclipse.elk.alg.force/src/org/eclipse/elk/alg/force/graph/FNode.java
index 27fecfe588..f669191b7d 100644
--- a/plugins/org.eclipse.elk.alg.force/src/org/eclipse/elk/alg/force/graph/FNode.java
+++ b/plugins/org.eclipse.elk.alg.force/src/org/eclipse/elk/alg/force/graph/FNode.java
@@ -12,8 +12,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.eclipse.elk.core.math.KVector;
-
 /**
  * A node in the force graph.
  * 
diff --git a/plugins/org.eclipse.elk.alg.graphviz.dot/src-gen/org/eclipse/elk/alg/graphviz/dot/services/GraphvizDotGrammarAccess.java b/plugins/org.eclipse.elk.alg.graphviz.dot/src-gen/org/eclipse/elk/alg/graphviz/dot/services/GraphvizDotGrammarAccess.java
index 97e69e0e36..0abc74e00a 100644
--- a/plugins/org.eclipse.elk.alg.graphviz.dot/src-gen/org/eclipse/elk/alg/graphviz/dot/services/GraphvizDotGrammarAccess.java
+++ b/plugins/org.eclipse.elk.alg.graphviz.dot/src-gen/org/eclipse/elk/alg/graphviz/dot/services/GraphvizDotGrammarAccess.java
@@ -25,7 +25,6 @@
 import org.eclipse.xtext.RuleCall;
 import org.eclipse.xtext.TerminalRule;
 import org.eclipse.xtext.common.services.TerminalsGrammarAccess;
-import org.eclipse.xtext.service.AbstractElementFinder.AbstractEnumRuleElementFinder;
 import org.eclipse.xtext.service.AbstractElementFinder.AbstractGrammarElementFinder;
 import org.eclipse.xtext.service.GrammarProvider;
 
diff --git a/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/InteractiveLayeredGraphVisitor.java b/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/InteractiveLayeredGraphVisitor.java
index 4b4c772f81..457645012c 100644
--- a/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/InteractiveLayeredGraphVisitor.java
+++ b/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/InteractiveLayeredGraphVisitor.java
@@ -19,7 +19,6 @@
 import org.eclipse.elk.alg.layered.options.LayeredOptions;
 import org.eclipse.elk.alg.layered.options.LayeringStrategy;
 import org.eclipse.elk.alg.layered.options.OrderingStrategy;
-import org.eclipse.elk.core.UnsupportedGraphException;
 import org.eclipse.elk.core.math.KVector;
 import org.eclipse.elk.core.options.CoreOptions;
 import org.eclipse.elk.core.options.Direction;
diff --git a/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/compaction/oned/OneDimensionalCompactor.java b/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/compaction/oned/OneDimensionalCompactor.java
index 759b0d981c..644c0cef2b 100644
--- a/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/compaction/oned/OneDimensionalCompactor.java
+++ b/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/compaction/oned/OneDimensionalCompactor.java
@@ -9,11 +9,6 @@
  *******************************************************************************/
 package org.eclipse.elk.alg.layered.compaction.oned;
 
-// elkjs-exclude-start
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.PrintWriter;
-// elkjs-exclude-end
 import java.util.List;
 import java.util.Map;
 
diff --git a/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/p2layers/InteractiveLayerer.java b/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/p2layers/InteractiveLayerer.java
index 59c5148581..f1998cc89b 100644
--- a/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/p2layers/InteractiveLayerer.java
+++ b/plugins/org.eclipse.elk.alg.layered/src/org/eclipse/elk/alg/layered/p2layers/InteractiveLayerer.java
@@ -9,12 +9,9 @@
  *******************************************************************************/
 package org.eclipse.elk.alg.layered.p2layers;
 
-import java.util.ArrayList;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.ListIterator;
-import java.util.Set;
-
 import org.eclipse.elk.alg.layered.LayeredPhases;
 import org.eclipse.elk.alg.layered.graph.LEdge;
 import org.eclipse.elk.alg.layered.graph.LGraph;
diff --git a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/intermediate/CompactionProcessor.java b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/intermediate/CompactionProcessor.java
index 2dc5052db3..df86ae32b4 100644
--- a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/intermediate/CompactionProcessor.java
+++ b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/intermediate/CompactionProcessor.java
@@ -10,7 +10,6 @@
 package org.eclipse.elk.alg.mrtree.intermediate;
 
 import java.util.ArrayList;
-import java.util.Comparator;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -20,10 +19,8 @@
 import java.util.stream.Collectors;
 
 import org.eclipse.elk.alg.mrtree.TreeUtil;
-import org.eclipse.elk.alg.mrtree.graph.TEdge;
 import org.eclipse.elk.alg.mrtree.graph.TGraph;
 import org.eclipse.elk.alg.mrtree.graph.TNode;
-import org.eclipse.elk.alg.mrtree.options.CompactionMode;
 import org.eclipse.elk.alg.mrtree.options.EdgeRoutingMode;
 import org.eclipse.elk.alg.mrtree.options.InternalProperties;
 import org.eclipse.elk.alg.mrtree.options.MrTreeOptions;
diff --git a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/intermediate/LevelCoordinatesProcessor.java b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/intermediate/LevelCoordinatesProcessor.java
index 70b66fce85..6b547aae84 100644
--- a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/intermediate/LevelCoordinatesProcessor.java
+++ b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/intermediate/LevelCoordinatesProcessor.java
@@ -9,26 +9,15 @@
 package org.eclipse.elk.alg.mrtree.intermediate;
 
 import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.LinkedList;
 import java.util.List;
-import java.util.Map;
-import java.util.stream.Collectors;
-
 import org.eclipse.elk.alg.mrtree.graph.TGraph;
 import org.eclipse.elk.alg.mrtree.graph.TNode;
 import org.eclipse.elk.alg.mrtree.options.InternalProperties;
 import org.eclipse.elk.alg.mrtree.options.MrTreeOptions;
 import org.eclipse.elk.core.alg.ILayoutProcessor;
-import org.eclipse.elk.core.options.Direction;
 import org.eclipse.elk.core.util.IElkProgressMonitor;
 import org.eclipse.elk.core.util.Pair;
 
-import com.google.common.collect.Iterables;
-import com.google.common.collect.Lists;
-
 /**
  * A processor that computes the start and end coordinates for each levels nodes.
  * The used coordinates depend on the layout direction of the graph.
diff --git a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p2order/NodeOrderer.java b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p2order/NodeOrderer.java
index ba7d0fe942..710c3f1229 100644
--- a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p2order/NodeOrderer.java
+++ b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p2order/NodeOrderer.java
@@ -9,17 +9,13 @@
  *******************************************************************************/
 package org.eclipse.elk.alg.mrtree.p2order;
 
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
-
 import org.eclipse.elk.alg.mrtree.TreeLayoutPhases;
-import org.eclipse.elk.alg.mrtree.TreeUtil;
 import org.eclipse.elk.alg.mrtree.graph.TEdge;
 import org.eclipse.elk.alg.mrtree.graph.TGraph;
 import org.eclipse.elk.alg.mrtree.graph.TNode;
@@ -27,7 +23,6 @@
 import org.eclipse.elk.alg.mrtree.options.InternalProperties;
 import org.eclipse.elk.alg.mrtree.options.MrTreeOptions;
 import org.eclipse.elk.alg.mrtree.options.OrderWeighting;
-import org.eclipse.elk.alg.mrtree.p2order.OrderBalance.SortTEdgeTargetProperty;
 import org.eclipse.elk.core.alg.ILayoutPhase;
 import org.eclipse.elk.core.alg.LayoutProcessorConfiguration;
 import org.eclipse.elk.core.util.IElkProgressMonitor;
diff --git a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p3place/NodePlacer.java b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p3place/NodePlacer.java
index 14d014c054..eadbff9de1 100644
--- a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p3place/NodePlacer.java
+++ b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p3place/NodePlacer.java
@@ -9,13 +9,9 @@
  *******************************************************************************/
 package org.eclipse.elk.alg.mrtree.p3place;
 
-import java.util.ArrayList;
 import java.util.LinkedList;
-import java.util.List;
-
 import org.eclipse.elk.alg.mrtree.TreeLayoutPhases;
 import org.eclipse.elk.alg.mrtree.TreeUtil;
-import org.eclipse.elk.alg.mrtree.graph.TEdge;
 import org.eclipse.elk.alg.mrtree.graph.TGraph;
 import org.eclipse.elk.alg.mrtree.graph.TNode;
 import org.eclipse.elk.alg.mrtree.intermediate.IntermediateProcessorStrategy;
@@ -23,11 +19,8 @@
 import org.eclipse.elk.alg.mrtree.options.MrTreeOptions;
 import org.eclipse.elk.core.alg.ILayoutPhase;
 import org.eclipse.elk.core.alg.LayoutProcessorConfiguration;
-import org.eclipse.elk.core.math.KVector;
 import org.eclipse.elk.core.options.Direction;
 import org.eclipse.elk.core.util.IElkProgressMonitor;
-import org.eclipse.elk.core.util.Pair;
-
 import com.google.common.collect.Iterables;
 
 /**
diff --git a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p4route/EdgeRouter.java b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p4route/EdgeRouter.java
index 63da4cf065..02d593fa24 100644
--- a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p4route/EdgeRouter.java
+++ b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p4route/EdgeRouter.java
@@ -11,7 +11,6 @@
 
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -32,7 +31,6 @@
 import org.eclipse.elk.core.util.IElkProgressMonitor;
 import org.eclipse.elk.core.util.Pair;
 import org.eclipse.elk.core.util.Triple;
-import org.eclipse.elk.graph.ElkNode;
 
 /**
  * This class implements a dull edge routing by setting just source and target of a edge in mode MiddleToMiddle 
diff --git a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p4route/MultiLevelEdgeNodeNodeGap.java b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p4route/MultiLevelEdgeNodeNodeGap.java
index 819172df52..0c3a3fe20b 100644
--- a/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p4route/MultiLevelEdgeNodeNodeGap.java
+++ b/plugins/org.eclipse.elk.alg.mrtree/src/org/eclipse/elk/alg/mrtree/p4route/MultiLevelEdgeNodeNodeGap.java
@@ -10,7 +10,6 @@
 
 import java.util.LinkedList;
 
-import org.eclipse.elk.alg.mrtree.TreeUtil;
 import org.eclipse.elk.alg.mrtree.graph.TEdge;
 import org.eclipse.elk.alg.mrtree.graph.TGraph;
 import org.eclipse.elk.alg.mrtree.graph.TNode;
@@ -18,7 +17,6 @@
 import org.eclipse.elk.alg.mrtree.options.MrTreeOptions;
 import org.eclipse.elk.core.math.KVector;
 import org.eclipse.elk.core.options.Direction;
-import org.eclipse.elk.core.util.Pair;
 import org.eclipse.elk.core.util.Triple;
 
 /**
diff --git a/plugins/org.eclipse.elk.alg.radial/src/org/eclipse/elk/alg/radial/intermediate/compaction/AbstractRadiusExtensionCompaction.java b/plugins/org.eclipse.elk.alg.radial/src/org/eclipse/elk/alg/radial/intermediate/compaction/AbstractRadiusExtensionCompaction.java
index 6723ec5cf5..dc1dc54fa7 100644
--- a/plugins/org.eclipse.elk.alg.radial/src/org/eclipse/elk/alg/radial/intermediate/compaction/AbstractRadiusExtensionCompaction.java
+++ b/plugins/org.eclipse.elk.alg.radial/src/org/eclipse/elk/alg/radial/intermediate/compaction/AbstractRadiusExtensionCompaction.java
@@ -11,10 +11,7 @@
 
 import java.util.List;
 
-import org.eclipse.elk.graph.ElkConnectableShape;
-import org.eclipse.elk.graph.ElkEdge;
 import org.eclipse.elk.graph.ElkNode;
-import org.eclipse.elk.graph.util.ElkGraphUtil;
 
 /**
  * The class provides basic logic for extending or compacting radii, like overlap calculation.
diff --git a/plugins/org.eclipse.elk.alg.rectpacking/src/org/eclipse/elk/alg/rectpacking/util/DrawingData.java b/plugins/org.eclipse.elk.alg.rectpacking/src/org/eclipse/elk/alg/rectpacking/util/DrawingData.java
index a97da22f72..69a500a1ee 100644
--- a/plugins/org.eclipse.elk.alg.rectpacking/src/org/eclipse/elk/alg/rectpacking/util/DrawingData.java
+++ b/plugins/org.eclipse.elk.alg.rectpacking/src/org/eclipse/elk/alg/rectpacking/util/DrawingData.java
@@ -9,8 +9,6 @@
  *******************************************************************************/
 package org.eclipse.elk.alg.rectpacking.util;
 
-import org.eclipse.elk.core.math.ElkPadding;
-
 /**
  * Class that offers instances to save information about a possible drawing. Can be used to return multiple values that
  * are calculated for a possible drawing in a method for example.
diff --git a/plugins/org.eclipse.elk.core.debug.grandom/src-gen/org/eclipse/elk/core/debug/grandom/services/GRandomGrammarAccess.java b/plugins/org.eclipse.elk.core.debug.grandom/src-gen/org/eclipse/elk/core/debug/grandom/services/GRandomGrammarAccess.java
index 6bb310c63b..9438413b63 100644
--- a/plugins/org.eclipse.elk.core.debug.grandom/src-gen/org/eclipse/elk/core/debug/grandom/services/GRandomGrammarAccess.java
+++ b/plugins/org.eclipse.elk.core.debug.grandom/src-gen/org/eclipse/elk/core/debug/grandom/services/GRandomGrammarAccess.java
@@ -26,7 +26,6 @@
 import org.eclipse.xtext.TerminalRule;
 import org.eclipse.xtext.UnorderedGroup;
 import org.eclipse.xtext.common.services.TerminalsGrammarAccess;
-import org.eclipse.xtext.service.AbstractElementFinder.AbstractEnumRuleElementFinder;
 import org.eclipse.xtext.service.AbstractElementFinder.AbstractGrammarElementFinder;
 import org.eclipse.xtext.service.GrammarProvider;
 
diff --git a/plugins/org.eclipse.elk.core.debug/src/org/eclipse/elk/core/debug/model/ExecutionInfoContentProvider.java b/plugins/org.eclipse.elk.core.debug/src/org/eclipse/elk/core/debug/model/ExecutionInfoContentProvider.java
index 0617233d2b..cbacf49573 100644
--- a/plugins/org.eclipse.elk.core.debug/src/org/eclipse/elk/core/debug/model/ExecutionInfoContentProvider.java
+++ b/plugins/org.eclipse.elk.core.debug/src/org/eclipse/elk/core/debug/model/ExecutionInfoContentProvider.java
@@ -12,7 +12,6 @@
 import java.util.List;
 import java.util.function.Predicate;
 
-import org.eclipse.elk.core.debug.model.ExecutionInfo;
 import org.eclipse.jface.viewers.ITreeContentProvider;
 
 /**
diff --git a/plugins/org.eclipse.elk.core.meta/src-gen/org/eclipse/elk/core/meta/services/MetaDataGrammarAccess.java b/plugins/org.eclipse.elk.core.meta/src-gen/org/eclipse/elk/core/meta/services/MetaDataGrammarAccess.java
index ededd0e483..4ca24288f5 100644
--- a/plugins/org.eclipse.elk.core.meta/src-gen/org/eclipse/elk/core/meta/services/MetaDataGrammarAccess.java
+++ b/plugins/org.eclipse.elk.core.meta/src-gen/org/eclipse/elk/core/meta/services/MetaDataGrammarAccess.java
@@ -26,7 +26,6 @@
 import org.eclipse.xtext.RuleCall;
 import org.eclipse.xtext.TerminalRule;
 import org.eclipse.xtext.UnorderedGroup;
-import org.eclipse.xtext.service.AbstractElementFinder.AbstractEnumRuleElementFinder;
 import org.eclipse.xtext.service.AbstractElementFinder.AbstractGrammarElementFinder;
 import org.eclipse.xtext.service.GrammarProvider;
 import org.eclipse.xtext.xbase.services.XbaseGrammarAccess;
diff --git a/plugins/org.eclipse.elk.core.service/src/org/eclipse/elk/core/service/ElkServicePlugin.java b/plugins/org.eclipse.elk.core.service/src/org/eclipse/elk/core/service/ElkServicePlugin.java
index 6bf338ef8f..afe972f1b7 100644
--- a/plugins/org.eclipse.elk.core.service/src/org/eclipse/elk/core/service/ElkServicePlugin.java
+++ b/plugins/org.eclipse.elk.core.service/src/org/eclipse/elk/core/service/ElkServicePlugin.java
@@ -17,9 +17,6 @@
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
-import org.eclipse.core.runtime.CoreException;
-import org.eclipse.core.runtime.IConfigurationElement;
-import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Plugin;
 import org.eclipse.core.runtime.preferences.InstanceScope;
 import org.eclipse.elk.core.data.ILayoutMetaDataProvider;
@@ -29,7 +26,6 @@
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.preferences.ScopedPreferenceStore;
-import org.eclipse.ui.statushandlers.StatusManager;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.BundleContext;
 
diff --git a/plugins/org.eclipse.elk.core/src/org/eclipse/elk/core/util/ElkUtil.java b/plugins/org.eclipse.elk.core/src/org/eclipse/elk/core/util/ElkUtil.java
index 9269afa115..df7136d9a1 100644
--- a/plugins/org.eclipse.elk.core/src/org/eclipse/elk/core/util/ElkUtil.java
+++ b/plugins/org.eclipse.elk.core/src/org/eclipse/elk/core/util/ElkUtil.java
@@ -20,7 +20,6 @@
 import java.util.regex.Pattern;
 
 import org.eclipse.elk.core.math.ElkMargin;
-import org.eclipse.elk.core.math.ElkPadding;
 import org.eclipse.elk.core.math.ElkRectangle;
 import org.eclipse.elk.core.math.KVector;
 import org.eclipse.elk.core.math.KVectorChain;
diff --git a/test/org.eclipse.elk.alg.common.test/src/org/eclipse/elk/alg/common/RectilinearConvexHullTest.java b/test/org.eclipse.elk.alg.common.test/src/org/eclipse/elk/alg/common/RectilinearConvexHullTest.java
index 8c46f4a493..18a62c6d32 100644
--- a/test/org.eclipse.elk.alg.common.test/src/org/eclipse/elk/alg/common/RectilinearConvexHullTest.java
+++ b/test/org.eclipse.elk.alg.common.test/src/org/eclipse/elk/alg/common/RectilinearConvexHullTest.java
@@ -18,8 +18,6 @@
 import javax.swing.JFrame;
 import javax.swing.JPanel;
 
-import org.eclipse.elk.alg.common.Point;
-import org.eclipse.elk.alg.common.RectilinearConvexHull;
 import org.eclipse.elk.core.math.ElkRectangle;
 import org.eclipse.elk.core.math.KVector;
 import org.junit.Assert;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/GeneralLayerUnzipperTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/GeneralLayerUnzipperTest.java
index 7531066abc..15f893c65a 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/GeneralLayerUnzipperTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/GeneralLayerUnzipperTest.java
@@ -10,8 +10,6 @@
 package org.eclipse.elk.alg.layered.intermediate;
 
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
 import org.eclipse.elk.alg.layered.LayeredLayoutProvider;
 import org.eclipse.elk.alg.layered.options.LayerUnzippingStrategy;
 import org.eclipse.elk.alg.layered.options.LayeredOptions;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/BetweenLayerEdgeTwoNodeCrossingsCounterTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/BetweenLayerEdgeTwoNodeCrossingsCounterTest.java
index f8c51b386e..967d16c081 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/BetweenLayerEdgeTwoNodeCrossingsCounterTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/BetweenLayerEdgeTwoNodeCrossingsCounterTest.java
@@ -17,7 +17,6 @@
 import org.eclipse.elk.alg.layered.graph.LNode;
 import org.eclipse.elk.alg.layered.graph.LPort;
 import org.eclipse.elk.alg.layered.graph.Layer;
-import org.eclipse.elk.alg.layered.intermediate.greedyswitch.BetweenLayerEdgeTwoNodeCrossingsCounter;
 import org.eclipse.elk.core.options.PortSide;
 import org.junit.Ignore;
 import org.junit.Test;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/NorthSouthEdgeNeighbouringNodeCrossingsCounterTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/NorthSouthEdgeNeighbouringNodeCrossingsCounterTest.java
index 51f587b493..d643b386d7 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/NorthSouthEdgeNeighbouringNodeCrossingsCounterTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/NorthSouthEdgeNeighbouringNodeCrossingsCounterTest.java
@@ -14,7 +14,6 @@
 
 import org.eclipse.elk.alg.layered.graph.LNode;
 import org.eclipse.elk.alg.layered.graph.LPort;
-import org.eclipse.elk.alg.layered.intermediate.greedyswitch.NorthSouthEdgeNeighbouringNodeCrossingsCounter;
 import org.eclipse.elk.alg.layered.options.InternalProperties;
 import org.eclipse.elk.alg.layered.options.LayeredOptions;
 import org.eclipse.elk.alg.test.PlainJavaInitialization;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/SwitchDeciderTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/SwitchDeciderTest.java
index ffc7115b03..0b3eae29e5 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/SwitchDeciderTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/intermediate/greedyswitch/SwitchDeciderTest.java
@@ -21,8 +21,6 @@
 import org.eclipse.elk.alg.layered.graph.LNode;
 import org.eclipse.elk.alg.layered.graph.LPort;
 import org.eclipse.elk.alg.layered.graph.Layer;
-import org.eclipse.elk.alg.layered.intermediate.greedyswitch.CrossingMatrixFiller;
-import org.eclipse.elk.alg.layered.intermediate.greedyswitch.SwitchDecider;
 import org.eclipse.elk.alg.layered.intermediate.greedyswitch.SwitchDecider.CrossingCountSide;
 import org.eclipse.elk.alg.layered.p3order.GraphInfoHolder;
 import org.eclipse.elk.alg.layered.p3order.LayerSweepCrossingMinimizer.CrossMinType;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue143And318Test.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue143And318Test.java
index dda85ba549..a934d26c75 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue143And318Test.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue143And318Test.java
@@ -12,7 +12,6 @@
 import static org.junit.Assert.assertNotEquals;
 
 import java.awt.geom.Line2D;
-import java.awt.geom.Line2D.Double;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -26,7 +25,6 @@
 import org.eclipse.elk.core.math.KVector;
 import org.eclipse.elk.core.math.KVectorChain;
 import org.eclipse.elk.core.util.ElkUtil;
-import org.eclipse.elk.graph.ElkBendPoint;
 import org.eclipse.elk.graph.ElkEdge;
 import org.eclipse.elk.graph.ElkEdgeSection;
 import org.eclipse.elk.graph.ElkNode;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue405Test.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue405Test.java
index 3b0046b09b..fee5fac87a 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue405Test.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue405Test.java
@@ -9,8 +9,6 @@
  *******************************************************************************/
 package org.eclipse.elk.alg.layered.issues;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.util.Collection;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue701Test.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue701Test.java
index 26c8416d5f..8a1f6b72d2 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue701Test.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue701Test.java
@@ -10,7 +10,6 @@
 package org.eclipse.elk.alg.layered.issues;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.util.ArrayList;
@@ -32,7 +31,6 @@
 import org.eclipse.elk.graph.ElkLabel;
 import org.eclipse.elk.graph.ElkNode;
 import org.eclipse.elk.graph.ElkPort;
-import org.eclipse.elk.graph.util.ElkGraphUtil;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue734Test.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue734Test.java
index 09a5360f9e..22c522cf2f 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue734Test.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/issues/Issue734Test.java
@@ -18,10 +18,8 @@
 import org.eclipse.elk.alg.layered.options.LayeredOptions;
 import org.eclipse.elk.alg.test.framework.LayoutTestRunner;
 import org.eclipse.elk.alg.test.framework.annotations.Algorithm;
-import org.eclipse.elk.alg.test.framework.annotations.DefaultConfiguration;
 import org.eclipse.elk.alg.test.framework.annotations.GraphResourceProvider;
 import org.eclipse.elk.alg.test.framework.io.AbstractResourcePath;
-import org.eclipse.elk.alg.test.framework.io.FileNameFilter;
 import org.eclipse.elk.alg.test.framework.io.ModelResourcePath;
 import org.eclipse.elk.core.util.ElkUtil;
 import org.eclipse.elk.graph.ElkEdge;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/AbstractBarycenterPortDistributorTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/AbstractBarycenterPortDistributorTest.java
index 8ab9d2ebb7..13f9db6977 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/AbstractBarycenterPortDistributorTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/AbstractBarycenterPortDistributorTest.java
@@ -20,10 +20,7 @@
 import org.eclipse.elk.alg.layered.graph.LPort;
 import org.eclipse.elk.alg.layered.graph.Layer;
 import org.eclipse.elk.alg.layered.intermediate.greedyswitch.TestGraphCreator;
-import org.eclipse.elk.alg.layered.p3order.GraphInfoHolder;
-import org.eclipse.elk.alg.layered.p3order.ISweepPortDistributor;
 import org.eclipse.elk.alg.layered.p3order.LayerSweepCrossingMinimizer.CrossMinType;
-import org.eclipse.elk.alg.layered.p3order.LayerTotalPortDistributor;
 import org.eclipse.elk.alg.layered.p3order.counting.IInitializable;
 import org.eclipse.elk.core.data.LayoutMetaDataService;
 import org.eclipse.elk.core.options.PortSide;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/GreedyPortDistributorTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/GreedyPortDistributorTest.java
index 9d7c55bb0b..e80423511b 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/GreedyPortDistributorTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/GreedyPortDistributorTest.java
@@ -23,7 +23,6 @@
 import org.eclipse.elk.alg.layered.graph.LPort;
 import org.eclipse.elk.alg.layered.graph.Layer;
 import org.eclipse.elk.alg.layered.intermediate.greedyswitch.TestGraphCreator;
-import org.eclipse.elk.alg.layered.p3order.GreedyPortDistributor;
 import org.eclipse.elk.alg.layered.p3order.counting.IInitializable;
 import org.eclipse.elk.core.options.PortSide;
 import org.junit.Test;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepCrossingMinimizerTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepCrossingMinimizerTest.java
index 2f38d81713..d8cfa70930 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepCrossingMinimizerTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepCrossingMinimizerTest.java
@@ -26,8 +26,6 @@
 import org.eclipse.elk.alg.layered.intermediate.greedyswitch.TestGraphCreator;
 import org.eclipse.elk.alg.layered.options.InternalProperties;
 import org.eclipse.elk.alg.layered.options.LayeredOptions;
-import org.eclipse.elk.alg.layered.p3order.GraphInfoHolder;
-import org.eclipse.elk.alg.layered.p3order.LayerSweepCrossingMinimizer;
 import org.eclipse.elk.alg.layered.p3order.LayerSweepCrossingMinimizer.CrossMinType;
 import org.eclipse.elk.alg.test.PlainJavaInitialization;
 import org.eclipse.elk.core.options.PortConstraints;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepHierarchicalTwoSidedGreedySwitchTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepHierarchicalTwoSidedGreedySwitchTest.java
index b9e6594445..2f6c84a4c4 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepHierarchicalTwoSidedGreedySwitchTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepHierarchicalTwoSidedGreedySwitchTest.java
@@ -20,7 +20,6 @@
 import org.eclipse.elk.alg.layered.graph.Layer;
 import org.eclipse.elk.alg.layered.intermediate.greedyswitch.TestGraphCreator;
 import org.eclipse.elk.alg.layered.options.LayeredOptions;
-import org.eclipse.elk.alg.layered.p3order.LayerSweepCrossingMinimizer;
 import org.eclipse.elk.alg.layered.p3order.LayerSweepCrossingMinimizer.CrossMinType;
 import org.eclipse.elk.core.data.LayoutMetaDataService;
 import org.eclipse.elk.core.options.PortSide;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepTypeDeciderTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepTypeDeciderTest.java
index c3676b4a69..db16266633 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepTypeDeciderTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/LayerSweepTypeDeciderTest.java
@@ -19,9 +19,7 @@
 import org.eclipse.elk.alg.layered.graph.Layer;
 import org.eclipse.elk.alg.layered.intermediate.greedyswitch.TestGraphCreator;
 import org.eclipse.elk.alg.layered.options.LayeredOptions;
-import org.eclipse.elk.alg.layered.p3order.GraphInfoHolder;
 import org.eclipse.elk.alg.layered.p3order.LayerSweepCrossingMinimizer.CrossMinType;
-import org.eclipse.elk.alg.layered.p3order.LayerSweepTypeDecider;
 import org.eclipse.elk.alg.layered.p3order.counting.IInitializable;
 import org.eclipse.elk.core.data.LayoutMetaDataService;
 import org.eclipse.elk.core.options.PortSide;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/BinaryIndexedTreeTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/BinaryIndexedTreeTest.java
index 3595cdd597..464a6be270 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/BinaryIndexedTreeTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/BinaryIndexedTreeTest.java
@@ -12,7 +12,6 @@
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
 
-import org.eclipse.elk.alg.layered.p3order.counting.BinaryIndexedTree;
 import org.junit.Test;
 
 // CHECKSTYLEOFF MagicNumber
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/CrossingsCounterTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/CrossingsCounterTest.java
index 50102e4050..a918bf0789 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/CrossingsCounterTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/CrossingsCounterTest.java
@@ -22,7 +22,6 @@
 import org.eclipse.elk.alg.layered.intermediate.greedyswitch.InLayerEdgeTestGraphCreator;
 import org.eclipse.elk.alg.layered.p3order.GraphInfoHolder;
 import org.eclipse.elk.alg.layered.p3order.LayerSweepCrossingMinimizer.CrossMinType;
-import org.eclipse.elk.alg.layered.p3order.counting.CrossingsCounter;
 import org.eclipse.elk.core.options.PortSide;
 import org.junit.Ignore;
 import org.junit.Test;
diff --git a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/NorthSouthEdgeAllCrossingsCounterTest.java b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/NorthSouthEdgeAllCrossingsCounterTest.java
index c3bf39ad73..322fbd40f0 100644
--- a/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/NorthSouthEdgeAllCrossingsCounterTest.java
+++ b/test/org.eclipse.elk.alg.layered.test/src/org/eclipse/elk/alg/layered/p3order/counting/NorthSouthEdgeAllCrossingsCounterTest.java
@@ -16,7 +16,6 @@
 import org.eclipse.elk.alg.layered.graph.LPort;
 import org.eclipse.elk.alg.layered.graph.Layer;
 import org.eclipse.elk.alg.layered.intermediate.greedyswitch.NorthSouthEdgeTestGraphCreator;
-import org.eclipse.elk.alg.layered.p3order.counting.CrossingsCounter;
 import org.eclipse.elk.core.data.LayoutMetaDataService;
 import org.eclipse.elk.core.options.PortSide;
 import org.junit.Before;
diff --git a/test/org.eclipse.elk.alg.spore.test/src/org/eclipse/elk/alg/spore/test/UtilsTest.java b/test/org.eclipse.elk.alg.spore.test/src/org/eclipse/elk/alg/spore/test/UtilsTest.java
index 550e709754..1260f5874e 100644
--- a/test/org.eclipse.elk.alg.spore.test/src/org/eclipse/elk/alg/spore/test/UtilsTest.java
+++ b/test/org.eclipse.elk.alg.spore.test/src/org/eclipse/elk/alg/spore/test/UtilsTest.java
@@ -11,8 +11,6 @@
 
 import static org.junit.Assert.assertTrue;
 
-import java.io.File;
-import java.util.Arrays;
 import java.util.List;
 
 import org.eclipse.elk.alg.common.compaction.oned.CompareFuzzy;
@@ -21,7 +19,6 @@
 import org.eclipse.elk.core.math.ElkMath;
 import org.eclipse.elk.core.math.ElkRectangle;
 import org.eclipse.elk.core.math.KVector;
-import org.eclipse.elk.core.util.ElkUtil;
 import org.eclipse.elk.core.util.Pair;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/LayoutConfiguratorTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/LayoutConfiguratorTest.java
index ae8088fecd..109b54fdf2 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/LayoutConfiguratorTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/LayoutConfiguratorTest.java
@@ -11,7 +11,6 @@
 
 import static org.junit.Assert.assertEquals;
 
-import org.eclipse.elk.core.LayoutConfigurator;
 import org.eclipse.elk.core.options.CoreOptions;
 import org.eclipse.elk.core.util.ElkUtil;
 import org.eclipse.elk.graph.ElkGraphElement;
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/RecursiveGraphLayoutEngineTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/RecursiveGraphLayoutEngineTest.java
index 56dfb22792..a908bbabab 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/RecursiveGraphLayoutEngineTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/RecursiveGraphLayoutEngineTest.java
@@ -12,8 +12,6 @@
 import static org.junit.Assert.*;
 
 import org.eclipse.elk.alg.test.PlainJavaInitialization;
-import org.eclipse.elk.core.RecursiveGraphLayoutEngine;
-import org.eclipse.elk.core.UnsupportedConfigurationException;
 import org.eclipse.elk.core.data.LayoutAlgorithmData;
 import org.eclipse.elk.core.data.LayoutMetaDataService;
 import org.eclipse.elk.core.options.CoreOptions;
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/AlgorithmAssemblerTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/AlgorithmAssemblerTest.java
index 32033cbab4..e13418928f 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/AlgorithmAssemblerTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/AlgorithmAssemblerTest.java
@@ -16,10 +16,6 @@
 
 import java.util.List;
 
-import org.eclipse.elk.core.alg.AlgorithmAssembler;
-import org.eclipse.elk.core.alg.ILayoutPhase;
-import org.eclipse.elk.core.alg.ILayoutProcessor;
-import org.eclipse.elk.core.alg.LayoutProcessorConfiguration;
 import org.junit.Test;
 
 public class AlgorithmAssemblerTest {
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/LayoutProcessorConfigurationTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/LayoutProcessorConfigurationTest.java
index ca9adcb634..fe05c0dbcc 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/LayoutProcessorConfigurationTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/LayoutProcessorConfigurationTest.java
@@ -11,7 +11,6 @@
 
 import static org.junit.Assert.assertEquals;
 
-import org.eclipse.elk.core.alg.LayoutProcessorConfiguration;
 import org.junit.Ignore;
 import org.junit.Test;
 
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/TestPhases.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/TestPhases.java
index c48c4f04b7..8c0bef7c11 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/TestPhases.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/TestPhases.java
@@ -9,9 +9,6 @@
  *******************************************************************************/
 package org.eclipse.elk.core.alg;
 
-import org.eclipse.elk.core.alg.ILayoutPhase;
-import org.eclipse.elk.core.alg.ILayoutPhaseFactory;
-import org.eclipse.elk.core.alg.LayoutProcessorConfiguration;
 import org.eclipse.elk.core.util.IElkProgressMonitor;
 
 /**
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/TestProcessors.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/TestProcessors.java
index 60645fbd70..9ee44713a9 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/TestProcessors.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/alg/TestProcessors.java
@@ -9,8 +9,6 @@
  *******************************************************************************/
 package org.eclipse.elk.core.alg;
 
-import org.eclipse.elk.core.alg.ILayoutProcessor;
-import org.eclipse.elk.core.alg.ILayoutProcessorFactory;
 import org.eclipse.elk.core.util.IElkProgressMonitor;
 
 public enum TestProcessors implements ILayoutProcessorFactory<StringBuffer> {
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/BezierSplineTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/BezierSplineTest.java
index 0edbe46229..a4911a6462 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/BezierSplineTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/BezierSplineTest.java
@@ -2,8 +2,6 @@
 
 import static org.junit.Assert.assertEquals;
 
-import org.eclipse.elk.core.math.BezierSpline;
-import org.eclipse.elk.core.math.KVector;
 import org.junit.Test;
 
 public class BezierSplineTest {
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/CubicSplineInterpolatorTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/CubicSplineInterpolatorTest.java
index b09a70fb49..953dd7bd88 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/CubicSplineInterpolatorTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/CubicSplineInterpolatorTest.java
@@ -3,9 +3,6 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
-import org.eclipse.elk.core.math.BezierSpline;
-import org.eclipse.elk.core.math.CubicSplineInterpolator;
-import org.eclipse.elk.core.math.KVector;
 import org.junit.Test;
 
 public class CubicSplineInterpolatorTest {
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/ElkMathTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/ElkMathTest.java
index fd0d1ed376..168936ba4d 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/ElkMathTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/ElkMathTest.java
@@ -9,11 +9,6 @@
  *******************************************************************************/
 package org.eclipse.elk.core.math;
 
-import org.eclipse.elk.core.math.ElkMath;
-import org.eclipse.elk.core.math.ElkRectangle;
-import org.eclipse.elk.core.math.KVector;
-import org.eclipse.elk.core.math.KVectorChain;
-
 import static org.junit.Assert.*;
 import org.junit.Test;
 
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/KVectorChainTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/KVectorChainTest.java
index 2e5539cb21..710a190f8d 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/KVectorChainTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/KVectorChainTest.java
@@ -3,8 +3,6 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
-import org.eclipse.elk.core.math.KVector;
-import org.eclipse.elk.core.math.KVectorChain;
 import org.junit.Test;
 
 public class KVectorChainTest {
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/KVectorTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/KVectorTest.java
index bea9b78ef6..f47f4931c2 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/KVectorTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/math/KVectorTest.java
@@ -4,7 +4,6 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import org.eclipse.elk.core.math.KVector;
 import org.junit.Test;
 
 public class KVectorTest {
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/validation/GraphValidatorTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/validation/GraphValidatorTest.java
index 16d1408806..197b91ab13 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/validation/GraphValidatorTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/validation/GraphValidatorTest.java
@@ -23,9 +23,6 @@
 import org.eclipse.elk.core.util.AlgorithmFactory;
 import org.eclipse.elk.core.util.ElkUtil;
 import org.eclipse.elk.core.util.IElkProgressMonitor;
-import org.eclipse.elk.core.validation.GraphIssue;
-import org.eclipse.elk.core.validation.GraphValidator;
-import org.eclipse.elk.core.validation.IValidatingGraphElementVisitor;
 import org.eclipse.elk.graph.ElkGraphElement;
 import org.eclipse.elk.graph.ElkNode;
 import org.eclipse.elk.graph.util.ElkGraphUtil;
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/validation/LayoutOptionValidatorTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/validation/LayoutOptionValidatorTest.java
index e66536c71c..4de53a7249 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/validation/LayoutOptionValidatorTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/core/validation/LayoutOptionValidatorTest.java
@@ -15,7 +15,6 @@
 import org.eclipse.elk.core.data.LayoutOptionData;
 import org.eclipse.elk.core.options.CoreOptions;
 import org.eclipse.elk.core.util.ElkUtil;
-import org.eclipse.elk.core.validation.LayoutOptionValidator;
 import org.eclipse.elk.graph.ElkNode;
 import org.eclipse.elk.graph.util.ElkGraphUtil;
 import org.junit.Test;
diff --git a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/graph/properties/PropertyTest.java b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/graph/properties/PropertyTest.java
index 9415578e90..5e057165ed 100644
--- a/test/org.eclipse.elk.core.test/src/org/eclipse/elk/graph/properties/PropertyTest.java
+++ b/test/org.eclipse.elk.core.test/src/org/eclipse/elk/graph/properties/PropertyTest.java
@@ -22,8 +22,6 @@
 import org.eclipse.elk.core.math.KVectorChain;
 import org.eclipse.elk.core.options.PortSide;
 import org.eclipse.elk.core.options.SizeConstraint;
-import org.eclipse.elk.graph.properties.IProperty;
-import org.eclipse.elk.graph.properties.Property;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
diff --git a/test/org.eclipse.elk.graph.test/src/org/eclipse/elk/graph/util/ElkGraphUtilTest.java b/test/org.eclipse.elk.graph.test/src/org/eclipse/elk/graph/util/ElkGraphUtilTest.java
index 5190595f3f..f429fea600 100644
--- a/test/org.eclipse.elk.graph.test/src/org/eclipse/elk/graph/util/ElkGraphUtilTest.java
+++ b/test/org.eclipse.elk.graph.test/src/org/eclipse/elk/graph/util/ElkGraphUtilTest.java
@@ -15,7 +15,6 @@
 import org.eclipse.elk.graph.ElkEdge;
 import org.eclipse.elk.graph.ElkNode;
 import org.eclipse.elk.graph.ElkPort;
-import org.eclipse.elk.graph.util.ElkGraphUtil;
 import org.junit.Test;
 
 /**