diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/HardcodedContracts.java b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/HardcodedContracts.java
index 038bffddab53..98a20300cd22 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/HardcodedContracts.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/HardcodedContracts.java
@@ -199,6 +199,10 @@ public class HardcodedContracts {
     return className.startsWith("junit.framework.") || className.startsWith("org.junit.");
   }
 
+  private static boolean isJunit5(String className) {
+    return className.startsWith("org.junit.jupiter.");
+  }
+
   private static boolean isTestng(String className) {
     return className.startsWith("org.testng.");
   }
@@ -245,7 +249,7 @@ public class HardcodedContracts {
 
     if (paramCount == 0) return Collections.emptyList();
 
-    int checkedParam = testng ? 0 : paramCount - 1;
+    int checkedParam = testng || isJunit5(className) ? 0 : paramCount - 1;
     MethodContract.ValueConstraint[] constraints = createConstraintArray(paramCount);
     if ("assertTrue".equals(methodName) || "assumeTrue".equals(methodName)) {
       constraints[checkedParam] = FALSE_VALUE;
diff --git a/java/java-tests/testData/inspection/dataFlow/fixture/Junit5Assert.java b/java/java-tests/testData/inspection/dataFlow/fixture/Junit5Assert.java
index 9a0c5684f31f..bc7ca9fbd981 100644
--- a/java/java-tests/testData/inspection/dataFlow/fixture/Junit5Assert.java
+++ b/java/java-tests/testData/inspection/dataFlow/fixture/Junit5Assert.java
@@ -8,4 +8,20 @@ class Contracts {
     String s = o.toString();
   }
 
+  void foo2(@Nullable Object o) {
+    Assertions.assertNotNull(o, "message");
+    String s = o.toString();
+  }
+
+  void foo3(java.util.function.BooleanSupplier o) {
+    Assertions.assertTrue(o, "message");
+  }
+
+  void foo3(boolean b) {
+    Assertions.assertTrue(b, "message");
+    if (<warning descr="Condition '!b' is always 'false'">!<warning descr="Value 'b' is always 'true'">b</warning></warning>) {
+      System.out.println("how?");
+    }
+  }
+
 }
\ No newline at end of file
diff --git a/java/java-tests/testSrc/com/intellij/java/codeInspection/HardcodedContractsTest.java b/java/java-tests/testSrc/com/intellij/java/codeInspection/HardcodedContractsTest.java
index b0add7d87154..15018ea6e785 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInspection/HardcodedContractsTest.java
+++ b/java/java-tests/testSrc/com/intellij/java/codeInspection/HardcodedContractsTest.java
@@ -17,11 +17,18 @@ package com.intellij.java.codeInspection;
 
 import com.intellij.JavaTestUtil;
 import com.intellij.codeInspection.dataFlow.DataFlowInspection;
+import com.intellij.testFramework.LightProjectDescriptor;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * @author peter
  */
 public class HardcodedContractsTest extends DataFlowInspectionTestCase {
+  @NotNull
+  @Override
+  protected LightProjectDescriptor getProjectDescriptor() {
+    return JAVA_8;
+  }
 
   @Override
   protected String getTestDataPath() {
@@ -110,8 +117,13 @@ public class HardcodedContractsTest extends DataFlowInspectionTestCase {
   }
 
   public void testJunit5Assert() {
-    myFixture.addClass("package org.junit.jupiter.api; public class Assertions {\n" +
+    myFixture.addClass("package org.junit.jupiter.api;" +
+                       "import java.util.function.BooleanSupplier;" +
+                       "public class Assertions {\n" +
                        "    public static void assertNotNull(Object actual){}" +
+                       "    public static void assertNotNull(Object actual, String message){}" +
+                       "    public static void assertTrue(boolean b, String message){}" +
+                       "    public static void assertTrue(BooleanSupplier b, String message){}" +
                        "}");
     checkHighlighting();
   }