diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa4b2ba1..04876910 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@
 
 ## unreleased
 - Fix DVector3.cross() returning always 0. [#128](https://github.com/tzaeschke/ode4j/issues/128)
+- Fix JUnit test lint. [#130](https://github.com/tzaeschke/ode4j/pull/130)
 
 ## 0.5.1 - 2023-09-17
 - Support for HiDPI screens / Apple Silicon/Retina. Contribution by valb3r,
diff --git a/core/src/test/java/org/ode4j/math/DMatrix3Test.java b/core/src/test/java/org/ode4j/math/DMatrix3Test.java
index 9e1f947c..31ad1830 100644
--- a/core/src/test/java/org/ode4j/math/DMatrix3Test.java
+++ b/core/src/test/java/org/ode4j/math/DMatrix3Test.java
@@ -34,24 +34,24 @@ public class DMatrix3Test {
 	@Test
 	public void testGet(){
 		DMatrix3 x = newM3();
-		assertEquals(x.get00(), 1., 0);
-		assertEquals(x.get01(), 2., 0);
-		assertEquals(x.get02(), 3., 0);
-		assertEquals(x.get10(), 4., 0);
-		assertEquals(x.get11(), 5., 0);
-		assertEquals(x.get12(), 6., 0);
-		assertEquals(x.get20(), 7., 0);
-		assertEquals(x.get21(), 8., 0);
-		assertEquals(x.get22(), 9., 0);
-		assertEquals(x.get(0, 0), 1., 0);
-		assertEquals(x.get(0, 1), 2., 0);
-		assertEquals(x.get(0, 2), 3., 0);
-		assertEquals(x.get(1, 0), 4., 0);
-		assertEquals(x.get(1, 1), 5., 0);
-		assertEquals(x.get(1, 2), 6., 0);
-		assertEquals(x.get(2, 0), 7., 0);
-		assertEquals(x.get(2, 1), 8., 0);
-		assertEquals(x.get(2, 2), 9., 0);
+		assertEquals(1., x.get00(), 0);
+		assertEquals(2., x.get01(), 0);
+		assertEquals(3., x.get02(), 0);
+		assertEquals(4., x.get10(), 0);
+		assertEquals(5., x.get11(), 0);
+		assertEquals(6., x.get12(), 0);
+		assertEquals(7., x.get20(), 0);
+		assertEquals(8., x.get21(), 0);
+		assertEquals(9., x.get22(), 0);
+		assertEquals(1., x.get(0, 0), 0);
+		assertEquals(2., x.get(0, 1), 0);
+		assertEquals(3., x.get(0, 2), 0);
+		assertEquals(4., x.get(1, 0), 0);
+		assertEquals(5., x.get(1, 1), 0);
+		assertEquals(6., x.get(1, 2), 0);
+		assertEquals(7., x.get(2, 0), 0);
+		assertEquals(8., x.get(2, 1), 0);
+		assertEquals(9., x.get(2, 2), 0);
 	}		
 		
 	@Test
@@ -76,23 +76,23 @@ public void testSet(){
 		
 		//test setIJ()
 		x.set00(1);
-		assertEquals(x.get00(), 1., 0);
+		assertEquals(1., x.get00(), 0);
 		x.set01(2);
-		assertEquals(x.get01(), 2., 0);
+		assertEquals(2., x.get01(), 0);
 		x.set02(3);
-		assertEquals(x.get02(), 3., 0);
+		assertEquals(3., x.get02(), 0);
 		x.set10(4);
-		assertEquals(x.get10(), 4., 0);
+		assertEquals(4., x.get10(), 0);
 		x.set11(5);
-		assertEquals(x.get11(), 5., 0);
+		assertEquals(5., x.get11(), 0);
 		x.set12(6);
-		assertEquals(x.get12(), 6., 0);
+		assertEquals(6., x.get12(), 0);
 		x.set20(7);
-		assertEquals(x.get20(), 7., 0);
+		assertEquals(7., x.get20(), 0);
 		x.set21(8);
-		assertEquals(x.get21(), 8., 0);
+		assertEquals(8., x.get21(), 0);
 		x.set22(9);
-		assertEquals(x.get22(), 9., 0);
+		assertEquals(9., x.get22(), 0);
 		assertEquals(x, x2);
 		
 		//test set(i, j)
diff --git a/core/src/test/java/org/ode4j/math/DQuaternionTest.java b/core/src/test/java/org/ode4j/math/DQuaternionTest.java
index 1ce9d815..b27a5c35 100644
--- a/core/src/test/java/org/ode4j/math/DQuaternionTest.java
+++ b/core/src/test/java/org/ode4j/math/DQuaternionTest.java
@@ -142,14 +142,14 @@ public void testReInverse() {
     @Test
     public void testGet(){
         DQuaternion x = new DQuaternion(1, 2, 3, 4);
-        assertEquals(x.get0(), 1., 0);
-        assertEquals(x.get1(), 2., 0);
-        assertEquals(x.get2(), 3., 0);
-        assertEquals(x.get3(), 4., 0);
-        assertEquals(x.get(0), 1., 0);
-        assertEquals(x.get(1), 2., 0);
-        assertEquals(x.get(2), 3., 0);
-        assertEquals(x.get(3), 4., 0);
+        assertEquals(1., x.get0(), 0);
+        assertEquals(2., x.get1(), 0);
+        assertEquals(3., x.get2(), 0);
+        assertEquals(4., x.get3(), 0);
+        assertEquals(1., x.get(0), 0);
+        assertEquals(2., x.get(1), 0);
+        assertEquals(3., x.get(2), 0);
+        assertEquals(4., x.get(3), 0);
     }
 
     @Test
@@ -174,23 +174,23 @@ public void testSet(){
         DQuaternion y = new DQuaternion(5, 6, 7, 8);
         DQuaternion z = new DQuaternion(9, 10, 11, 12);
         x.set0(9);
-        assertEquals(x.get0(), 9., 0);
+        assertEquals(9., x.get0(), 0);
         x.set1(10);
-        assertEquals(x.get1(), 10., 0);
+        assertEquals(10., x.get1(), 0);
         x.set2(11);
-        assertEquals(x.get2(), 11., 0);
+        assertEquals(11., x.get2(), 0);
         x.set3(12);
-        assertEquals(x.get3(), 12., 0);
+        assertEquals(12., x.get3(), 0);
         assertEquals(x, z);
 
         x.set(0, 5);
-        assertEquals(x.get0(), 5., 0);
+        assertEquals(5., x.get0(), 0);
         x.set(1, 6);
-        assertEquals(x.get1(), 6., 0);
+        assertEquals(6., x.get1(), 0);
         x.set(2, 7);
-        assertEquals(x.get2(), 7., 0);
+        assertEquals(7., x.get2(), 0);
         x.set(3, 8);
-        assertEquals(x.get3(), 8., 0);
+        assertEquals(8., x.get3(), 0);
         assertEquals(x, y);
 
         x.set(1, 2, 3, 4);
@@ -207,14 +207,14 @@ public void testInit(){
         DQuaternion z = new DQuaternion(x);
         assertTrue(x.isEq(z, 0));
         assertFalse(x.isEq(y, 0));
-        assertEquals(y.get0(), 0., 0);
-        assertEquals(y.get1(), 0., 0);
-        assertEquals(y.get2(), 0., 0);
-        assertEquals(y.get3(), 0., 0);
-
-        assertEquals(z.get0(), 1., 0);
-        assertEquals(z.get1(), 2., 0);
-        assertEquals(z.get2(), 3., 0);
+        assertEquals(0., y.get0(), 0);
+        assertEquals(0., y.get1(), 0);
+        assertEquals(0., y.get2(), 0);
+        assertEquals(0., y.get3(), 0);
+
+        assertEquals(1., z.get0(), 0);
+        assertEquals(2., z.get1(), 0);
+        assertEquals(3., z.get2(), 0);
         assertEquals(z.get3(), 4., 0);
     }
 
diff --git a/core/src/test/java/org/ode4j/math/DVector3Test.java b/core/src/test/java/org/ode4j/math/DVector3Test.java
index 24689e7d..98096186 100644
--- a/core/src/test/java/org/ode4j/math/DVector3Test.java
+++ b/core/src/test/java/org/ode4j/math/DVector3Test.java
@@ -25,8 +25,6 @@
 import org.junit.Test;
 import org.ode4j.ode.OdeMath;
 
-import java.util.Arrays;
-
 import static org.junit.Assert.*;
 
 public class DVector3Test {
@@ -98,12 +96,12 @@ public void testToFloatArray(){
     @Test
     public void testGet(){
         DVector3 x = new DVector3(1, 2, 3);
-        assertEquals(x.get0(), 1., 0);
-        assertEquals(x.get1(), 2., 0);
-        assertEquals(x.get2(), 3., 0);
-        assertEquals(x.get(0), 1., 0);
-        assertEquals(x.get(1), 2., 0);
-        assertEquals(x.get(2), 3., 0);
+        assertEquals(1., x.get0(), 0);
+        assertEquals(2., x.get1(), 0);
+        assertEquals(3., x.get2(), 0);
+        assertEquals(1., x.get(0), 0);
+        assertEquals(2., x.get(1), 0);
+        assertEquals(3., x.get(2), 0);
     }
 
     @Test
@@ -126,19 +124,19 @@ public void testSet(){
         DVector3 y = new DVector3(4, 5, 6);
         DVector3 z = new DVector3(7, 8, 9);
         x.set0(7);
-        assertEquals(x.get0(), 7., 0);
+        assertEquals(7., x.get0(), 0);
         x.set1(8);
-        assertEquals(x.get1(), 8., 0);
+        assertEquals(8., x.get1(), 0);
         x.set2(9);
-        assertEquals(x.get2(), 9., 0);
+        assertEquals(9., x.get2(), 0);
         assertTrue(x.isEq(z, 0));
 
         x.set(0, 4);
-        assertEquals(x.get0(), 4., 0);
+        assertEquals(4., x.get0(), 0);
         x.set(1, 5);
-        assertEquals(x.get1(), 5., 0);
+        assertEquals(5., x.get1(), 0);
         x.set(2, 6);
-        assertEquals(x.get2(), 6., 0);
+        assertEquals(6., x.get2(), 0);
         assertTrue(x.isEq(y, 0));
 
         x.set(1, 2, 3);
@@ -166,13 +164,13 @@ public void testInit(){
         DVector3 z = new DVector3(x);
         assertTrue(x.isEq(z, 0));
         assertFalse(x.isEq(y, 0));
-        assertEquals(y.get0(), 0., 0);
-        assertEquals(y.get1(), 0., 0);
-        assertEquals(y.get2(), 0., 0);
+        assertEquals(0., y.get0(), 0);
+        assertEquals(0., y.get1(), 0);
+        assertEquals(0., y.get2(), 0);
 
-        assertEquals(z.get0(), 1., 0);
-        assertEquals(z.get1(), 2., 0);
-        assertEquals(z.get2(), 3., 0);
+        assertEquals(1., z.get0(), 0);
+        assertEquals(2., z.get1(), 0);
+        assertEquals(3., z.get2(), 0);
     }
 
     @Test
diff --git a/core/src/test/java/org/ode4j/math/DVector6Test.java b/core/src/test/java/org/ode4j/math/DVector6Test.java
index 1194ba3c..87bda0ef 100644
--- a/core/src/test/java/org/ode4j/math/DVector6Test.java
+++ b/core/src/test/java/org/ode4j/math/DVector6Test.java
@@ -32,18 +32,18 @@ public class DVector6Test {
 	@Test
 	public void testGet(){
 		DVector6 x = new DVector6(1, 2, 3, 4, 5, 6);
-		assertEquals(x.get0(), 1., 0);
-		assertEquals(x.get1(), 2., 0);
-		assertEquals(x.get2(), 3., 0);
-		assertEquals(x.get3(), 4., 0);
-		assertEquals(x.get4(), 5., 0);
-		assertEquals(x.get5(), 6., 0);
-		assertEquals(x.get(0), 1., 0);
-		assertEquals(x.get(1), 2., 0);
-		assertEquals(x.get(2), 3., 0);
-		assertEquals(x.get(3), 4., 0);
-		assertEquals(x.get(4), 5., 0);
-		assertEquals(x.get(5), 6., 0);
+		assertEquals(1., x.get0(), 0);
+		assertEquals(2., x.get1(), 0);
+		assertEquals(3., x.get2(), 0);
+		assertEquals(4., x.get3(), 0);
+		assertEquals(5., x.get4(), 0);
+		assertEquals(6., x.get5(), 0);
+		assertEquals(1., x.get(0), 0);
+		assertEquals(2., x.get(1), 0);
+		assertEquals(3., x.get(2), 0);
+		assertEquals(4., x.get(3), 0);
+		assertEquals(5., x.get(4), 0);
+		assertEquals(6., x.get(5), 0);
 	}		
 		
 	@Test
@@ -102,19 +102,19 @@ public void testInit(){
 		DVector6 z = new DVector6(x);
 		assertTrue(x.isEq(z, 0));
 		assertFalse(x.isEq(y, 0));
-		assertEquals(y.get0(), 0., 0);
-		assertEquals(y.get1(), 0., 0);
-		assertEquals(y.get2(), 0., 0);
-		assertEquals(y.get3(), 0., 0);
-		assertEquals(y.get4(), 0., 0);
-		assertEquals(y.get5(), 0., 0);
+		assertEquals(0., y.get0(), 0);
+		assertEquals(0., y.get1(), 0);
+		assertEquals(0., y.get2(), 0);
+		assertEquals(0., y.get3(), 0);
+		assertEquals(0., y.get4(), 0);
+		assertEquals(0., y.get5(), 0);
 
-		assertEquals(z.get0(), 1., 0);
-		assertEquals(z.get1(), 2., 0);
-		assertEquals(z.get2(), 3., 0);
-		assertEquals(z.get3(), 4., 0);
-		assertEquals(z.get4(), 5., 0);
-		assertEquals(z.get5(), 6., 0);
+		assertEquals(1., z.get0(), 0);
+		assertEquals(2., z.get1(), 0);
+		assertEquals(3., z.get2(), 0);
+		assertEquals(4., z.get3(), 0);
+		assertEquals(5., z.get4(), 0);
+		assertEquals(6., z.get5(), 0);
 	}		
 	
 	@Test