diff --git a/api/internal/generators/utils.go b/api/internal/generators/utils.go
index 8909ab894..82040d420 100644
--- a/api/internal/generators/utils.go
+++ b/api/internal/generators/utils.go
@@ -5,7 +5,6 @@ package generators
 
 import (
 	"fmt"
-	"strings"
 
 	"github.com/go-errors/errors"
 	"sigs.k8s.io/kustomize/api/ifc"
@@ -51,11 +50,7 @@ func makeValidatedDataMap(
 			return nil, errors.Errorf(
 				"configmap %s illegally repeats the key `%s`", name, p.Key)
 		}
-		lines := strings.Split(p.Value, "\n")
-		for i := range lines {
-			lines[i] = strings.TrimSuffix(lines[i], " ")
-		}
-		knownKeys[p.Key] = strings.Join(lines, "\n")
+		knownKeys[p.Key] = p.Value
 	}
 	return knownKeys, nil
 }
diff --git a/api/krusty/baseandoverlaymedium_test.go b/api/krusty/baseandoverlaymedium_test.go
index bf5eecc7c..cfa1afa48 100644
--- a/api/krusty/baseandoverlaymedium_test.go
+++ b/api/krusty/baseandoverlaymedium_test.go
@@ -292,10 +292,8 @@ metadata:
 ---
 apiVersion: v1
 data:
-  nonsense: |
-    Lorem ipsum dolor sit amet, consectetur
-    adipiscing elit, sed do eiusmod tempor
-    incididunt ut labore et dolore magna aliqua.
+  nonsense: "Lorem ipsum dolor sit amet, consectetur\nadipiscing elit, sed do eiusmod
+    tempor\nincididunt ut labore et dolore magna aliqua. \n"
 kind: ConfigMap
 metadata:
   annotations:
@@ -304,6 +302,6 @@ metadata:
     app: mungebot
     org: kubernetes
     repo: test-infra
-  name: test-infra-app-config-4thktg822m
+  name: test-infra-app-config-49d6f5h7b5
 `)
 }
diff --git a/api/krusty/configmaps_test.go b/api/krusty/configmaps_test.go
index d7be3f58f..721979983 100644
--- a/api/krusty/configmaps_test.go
+++ b/api/krusty/configmaps_test.go
@@ -572,74 +572,3 @@ metadata:
   name: test-k9cc55dfm5
 `)
 }
-
-// regression test for https://github.com/kubernetes-sigs/kustomize/issues/4287
-func TestMultilineDataEndsWithSpace(t *testing.T) {
-	th := kusttest_test.MakeHarness(t)
-	th.WriteK(".", `
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-configMapGenerator:
-  - name: config_bla
-    files:
-      - cfg.text=cfg.text
-`)
-	th.WriteF("cfg.text", `bla
-bla
-bla 
-`)
-
-	m := th.Run(".", th.MakeDefaultOptions())
-	th.AssertActualEqualsExpected(
-		m, `apiVersion: v1
-data:
-  cfg.text: |
-    bla
-    bla
-    bla
-kind: ConfigMap
-metadata:
-  name: config_bla-4k548khbf5
-`)
-}
-
-// regression test to record the behavior prior to the fix for https://github.com/kubernetes-sigs/kustomize/issues/4287
-// to ensure that the fix does not affect leading and trailing newlines in ConfigMap data
-func TestMultilineDataEndsLeadingAndTrailingNewlines(t *testing.T) {
-	th := kusttest_test.MakeHarness(t)
-	th.WriteK(".", `
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-configMapGenerator:
-  - name: config_bla
-    files:
-      - cfg.text=cfg.text
-`)
-	th.WriteF("cfg.text", `
-
-bla
-bla
-bla
-
-
-
-`)
-
-	m := th.Run(".", th.MakeDefaultOptions())
-	th.AssertActualEqualsExpected(
-		m, `apiVersion: v1
-data:
-  cfg.text: |2+
-
-
-    bla
-    bla
-    bla
-
-
-
-kind: ConfigMap
-metadata:
-  name: config_bla-8dm6c68g22
-`)
-}