diff --git a/assert/assertions.go b/assert/assertions.go
index 4e91332bb..7aaa850a6 100644
--- a/assert/assertions.go
+++ b/assert/assertions.go
@@ -2100,6 +2100,9 @@ func ErrorIs(t TestingT, err, target error, msgAndArgs ...interface{}) bool {
 	var expectedText string
 	if target != nil {
 		expectedText = target.Error()
+		if err == nil {
+			return Fail(t, fmt.Sprintf("Expected error %q but got nil.", expectedText), msgAndArgs...)
+		}
 	}
 
 	chain := buildErrorChainString(err)
diff --git a/assert/assertions_test.go b/assert/assertions_test.go
index 9f859fa8d..8f0a0a958 100644
--- a/assert/assertions_test.go
+++ b/assert/assertions_test.go
@@ -3237,13 +3237,10 @@ func TestErrorIs(t *testing.T) {
 				"in chain: \"EOF\"\n",
 		},
 		{
-			err:    nil,
-			target: io.EOF,
-			result: false,
-			resultErrMsg: "" +
-				"Target error should be in err chain:\n" +
-				"expected: \"EOF\"\n" +
-				"in chain: \n",
+			err:          nil,
+			target:       io.EOF,
+			result:       false,
+			resultErrMsg: "Expected error \"EOF\" but got nil.\n",
 		},
 		{
 			err:    io.EOF,