diff --git a/hcl2template/common_test.go b/hcl2template/common_test.go
index 4a4889e8b..781febd90 100644
--- a/hcl2template/common_test.go
+++ b/hcl2template/common_test.go
@@ -190,6 +190,7 @@ var (
 	}
 	basicMockPostProcessor = &MockPostProcessor{
 		Config: MockConfig{
+			NotSquashed:      "value <UNKNOWN>",
 			NestedMockConfig: basicNestedMockConfig,
 			Nested:           basicNestedMockConfig,
 			NestedSlice: []NestedMockConfig{
diff --git a/hcl2template/testdata/complete/build.pkr.hcl b/hcl2template/testdata/complete/build.pkr.hcl
index 5d6745a01..0077d98e5 100644
--- a/hcl2template/testdata/complete/build.pkr.hcl
+++ b/hcl2template/testdata/complete/build.pkr.hcl
@@ -138,6 +138,7 @@ build {
             ["a","b"],
             ["c","d"]
         ]
+        not_squashed = "${var.foo} ${upper(build.ID)}"
 
         nested {
             string   = "string"
@@ -185,6 +186,7 @@ build {
             ["a","b"],
             ["c","d"]
         ]
+        not_squashed = "${var.foo} ${upper(build.ID)}"
 
         nested {
             string   = "string"