diff --git a/pkg/apis/pipeline/v1/matrix_types.go b/pkg/apis/pipeline/v1/matrix_types.go
index f51a0ac4af4..17cdc65b29f 100644
--- a/pkg/apis/pipeline/v1/matrix_types.go
+++ b/pkg/apis/pipeline/v1/matrix_types.go
@@ -236,7 +236,9 @@ func (m *Matrix) countGeneratedCombinationsFromParams() int {
 	}
 	count := 1
 	for _, param := range m.Params {
-		count *= len(param.Value.ArrayVal)
+		if len(param.Value.ArrayVal) > 0 {
+			count *= len(param.Value.ArrayVal)
+		}
 	}
 	return count
 }
diff --git a/pkg/apis/pipeline/v1/matrix_types_test.go b/pkg/apis/pipeline/v1/matrix_types_test.go
index 26b83f83c25..609d281d6dd 100644
--- a/pkg/apis/pipeline/v1/matrix_types_test.go
+++ b/pkg/apis/pipeline/v1/matrix_types_test.go
@@ -782,7 +782,7 @@ func TestPipelineTask_CountCombinations(t *testing.T) {
 	}{{
 		name: "combinations count is zero",
 		matrix: &v1.Matrix{
-			Params: v1.Params{{}}},
+			Params: v1.Params{}},
 		want: 0,
 	}, {
 		name: "combinations count is one from one parameter",
@@ -915,11 +915,20 @@ func TestPipelineTask_CountCombinations(t *testing.T) {
 				}},
 			}},
 		want: 7,
+	}, {
+		name: "matrix params with string value containing variable reference",
+		matrix: &v1.Matrix{
+			Params: v1.Params{{
+				Name: "GOARCH", Value: v1.ParamValue{ArrayVal: []string{"linux/amd64", "linux/ppc64le", "linux/s390x"}},
+			}, {
+				Name: "version", Value: v1.ParamValue{StringVal: "$(tasks.platforms.results.str[*])"}},
+			}},
+		want: 3,
 	}}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if d := cmp.Diff(tt.want, tt.matrix.CountCombinations()); d != "" {
-				t.Errorf("Matrix.CountCombinations() errors diff %s", diff.PrintWantGot(d))
+				t.Errorf("%s Matrix.CountCombinations() errors diff %s", tt.name, diff.PrintWantGot(d))
 			}
 		})
 	}
diff --git a/pkg/reconciler/pipelinerun/pipelinerun_test.go b/pkg/reconciler/pipelinerun/pipelinerun_test.go
index 780249b6a40..ddbda3da48e 100644
--- a/pkg/reconciler/pipelinerun/pipelinerun_test.go
+++ b/pkg/reconciler/pipelinerun/pipelinerun_test.go
@@ -8942,8 +8942,14 @@ spec:
            script: |
              echo "$(params.platform)"
     - name: b-task
-      taskRef:
-        name: mytask
+      taskSpec:
+        params:
+          - name: platform
+        steps:
+         - name: echo
+           image: alpine
+           script: |
+             echo "$(params.platform)"
       matrix:
         params:
           - name: platform
diff --git a/pkg/reconciler/pipelinerun/resources/pipelinerunresolution_test.go b/pkg/reconciler/pipelinerun/resources/pipelinerunresolution_test.go
index 9f93efe5456..47a8f0b972f 100644
--- a/pkg/reconciler/pipelinerun/resources/pipelinerunresolution_test.go
+++ b/pkg/reconciler/pipelinerun/resources/pipelinerunresolution_test.go
@@ -3801,10 +3801,10 @@ func TestResolvePipelineRunTask_WithMatrix(t *testing.T) {
 		name: "task with matrix - whole array results",
 		pt:   pts[2],
 		want: &ResolvedPipelineTask{
-			TaskRunNames: nil,
+			TaskRunNames: []string{"pipelinerun-pipelinetask-with-whole-array-results"},
 			TaskRuns:     nil,
 			PipelineTask: &pts[2],
-			ResolvedTask: nil,
+			ResolvedTask: rtr,
 		},
 		pst: pipelineRunState,
 	}} {
diff --git a/test/matrix_test.go b/test/matrix_test.go
index 04475140b02..bfecd74377b 100644
--- a/test/matrix_test.go
+++ b/test/matrix_test.go
@@ -29,6 +29,7 @@ import (
 	v1 "github.com/tektoncd/pipeline/pkg/apis/pipeline/v1"
 	"github.com/tektoncd/pipeline/test/diff"
 	"github.com/tektoncd/pipeline/test/parse"
+	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"knative.dev/pkg/apis"
 	duckv1 "knative.dev/pkg/apis/duck/v1"
@@ -68,11 +69,14 @@ spec:
       default: ""
     - name: package
       default: ""
+  results:
+  - name: str
+    type: string
   steps:
     - name: echo
       image: mirror.gcr.io/alpine
       script: |
-        echo "$(params.GOARCH) and $(params.version)"
+        echo -n "$(params.GOARCH) and $(params.version)" | tee $(results.str.path)
 `, namespace))
 
 	task1withresults := parse.MustParseV1Task(t, fmt.Sprintf(`
@@ -107,6 +111,22 @@ spec:
         echo -n "[\"go1.17\",\"go1.18.1\"]" | tee $(results.versions.path)
 `, namespace))
 
+	task3printer := parse.MustParseV1Task(t, fmt.Sprintf(`
+metadata:
+  name: printer
+  namespace: %s
+spec:
+  params:
+    - name: platform
+      value: "default-platform"
+  steps:
+    - name: produce-a-list-of-versions
+      image: mirror.gcr.io/bash
+      script: |
+        #!/usr/bin/env bash
+        echo "platform: $(params.platform)"
+`, namespace))
+
 	if _, err := c.V1TaskClient.Create(ctx, task, metav1.CreateOptions{}); err != nil {
 		t.Fatalf("Failed to create Task `%s`: %s", task.Name, err)
 	}
@@ -116,6 +136,9 @@ spec:
 	if _, err := c.V1TaskClient.Create(ctx, task2withresults, metav1.CreateOptions{}); err != nil {
 		t.Fatalf("Failed to create Task `%s`: %s", task2withresults.Name, err)
 	}
+	if _, err := c.V1TaskClient.Create(ctx, task3printer, metav1.CreateOptions{}); err != nil {
+		t.Fatalf("Failed to create Task `%s`: %s", task3printer.Name, err)
+	}
 
 	pipeline := parse.MustParseV1Pipeline(t, fmt.Sprintf(`
 metadata:
@@ -157,6 +180,13 @@ spec:
            params:
             - name: GOARCH
               value: I-do-not-exist
+    - name: printer-matrix
+      taskRef:
+        name: printer
+      matrix:
+        params:
+          - name: platform
+            value: $(tasks.matrix-include.results.str[*])
 `, helpers.ObjectNameForTest(t), namespace))
 
 	pipelineRun := parse.MustParseV1PipelineRun(t, fmt.Sprintf(`
@@ -208,6 +238,11 @@ spec:
 			}}},
 			TaskRunStatusFields: v1.TaskRunStatusFields{
 				Artifacts: &v1.Artifacts{},
+				Results: []v1.TaskRunResult{{
+					Name:  "str",
+					Type:  v1.ResultsTypeString,
+					Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "linux/amd64 and go1.17"},
+				}},
 			},
 		},
 	}, {
@@ -240,6 +275,11 @@ spec:
 			}}},
 			TaskRunStatusFields: v1.TaskRunStatusFields{
 				Artifacts: &v1.Artifacts{},
+				Results: []v1.TaskRunResult{{
+					Name:  "str",
+					Type:  v1.ResultsTypeString,
+					Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "linux/ppc64le and go1.17"},
+				}},
 			},
 		},
 	}, {
@@ -269,6 +309,11 @@ spec:
 			}}},
 			TaskRunStatusFields: v1.TaskRunStatusFields{
 				Artifacts: &v1.Artifacts{},
+				Results: []v1.TaskRunResult{{
+					Name:  "str",
+					Type:  v1.ResultsTypeString,
+					Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "linux/amd64 and go1.18.1"},
+				}},
 			},
 		},
 	}, {
@@ -298,6 +343,11 @@ spec:
 			}}},
 			TaskRunStatusFields: v1.TaskRunStatusFields{
 				Artifacts: &v1.Artifacts{},
+				Results: []v1.TaskRunResult{{
+					Name:  "str",
+					Type:  v1.ResultsTypeString,
+					Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "linux/ppc64le and go1.18.1"},
+				}},
 			},
 		},
 	}, {
@@ -319,6 +369,136 @@ spec:
 				Reason:  "Succeeded",
 				Message: "All Steps have completed executing",
 			}}},
+			TaskRunStatusFields: v1.TaskRunStatusFields{
+				Artifacts: &v1.Artifacts{},
+				Results: []v1.TaskRunResult{{
+					Name:  "str",
+					Type:  v1.ResultsTypeString,
+					Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "I-do-not-exist and "},
+				}},
+			},
+		},
+	}, {
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "pr-printer-matrix-0",
+		},
+		Spec: v1.TaskRunSpec{
+			Params: v1.Params{{
+				Name:  "platform",
+				Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "linux/amd64 and go1.17"},
+			}},
+			ServiceAccountName: "default",
+			TaskRef:            &v1.TaskRef{Name: "printer", Kind: v1.NamespacedTaskKind},
+		},
+		Status: v1.TaskRunStatus{
+			Status: duckv1.Status{
+				Conditions: duckv1.Conditions{{
+					Type:    apis.ConditionSucceeded,
+					Status:  corev1.ConditionTrue,
+					Reason:  "Succeeded",
+					Message: "All Steps have completed executing",
+				}},
+			},
+			TaskRunStatusFields: v1.TaskRunStatusFields{
+				Artifacts: &v1.Artifacts{},
+			},
+		},
+	}, {
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "pr-printer-matrix-1",
+		},
+		Spec: v1.TaskRunSpec{
+			Params: v1.Params{{
+				Name:  "platform",
+				Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "linux/ppc64le and go1.17"},
+			}},
+			ServiceAccountName: "default",
+			TaskRef:            &v1.TaskRef{Name: "printer", Kind: v1.NamespacedTaskKind},
+		},
+		Status: v1.TaskRunStatus{
+			Status: duckv1.Status{
+				Conditions: duckv1.Conditions{{
+					Type:    apis.ConditionSucceeded,
+					Status:  corev1.ConditionTrue,
+					Reason:  "Succeeded",
+					Message: "All Steps have completed executing",
+				}},
+			},
+			TaskRunStatusFields: v1.TaskRunStatusFields{
+				Artifacts: &v1.Artifacts{},
+			},
+		},
+	}, {
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "pr-printer-matrix-2",
+		},
+		Spec: v1.TaskRunSpec{
+			Params: v1.Params{{
+				Name:  "platform",
+				Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "linux/amd64 and go1.18.1"},
+			}},
+			ServiceAccountName: "default",
+			TaskRef:            &v1.TaskRef{Name: "printer", Kind: v1.NamespacedTaskKind},
+		},
+		Status: v1.TaskRunStatus{
+			Status: duckv1.Status{
+				Conditions: duckv1.Conditions{{
+					Type:    apis.ConditionSucceeded,
+					Status:  corev1.ConditionTrue,
+					Reason:  "Succeeded",
+					Message: "All Steps have completed executing",
+				}},
+			},
+			TaskRunStatusFields: v1.TaskRunStatusFields{
+				Artifacts: &v1.Artifacts{},
+			},
+		},
+	}, {
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "pr-printer-matrix-3",
+		},
+		Spec: v1.TaskRunSpec{
+			Params: v1.Params{{
+				Name:  "platform",
+				Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "linux/ppc64le and go1.18.1"},
+			}},
+			ServiceAccountName: "default",
+			TaskRef:            &v1.TaskRef{Name: "printer", Kind: v1.NamespacedTaskKind},
+		},
+		Status: v1.TaskRunStatus{
+			Status: duckv1.Status{
+				Conditions: duckv1.Conditions{{
+					Type:    apis.ConditionSucceeded,
+					Status:  corev1.ConditionTrue,
+					Reason:  "Succeeded",
+					Message: "All Steps have completed executing",
+				}},
+			},
+			TaskRunStatusFields: v1.TaskRunStatusFields{
+				Artifacts: &v1.Artifacts{},
+			},
+		},
+	}, {
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "pr-printer-matrix-4",
+		},
+		Spec: v1.TaskRunSpec{
+			Params: v1.Params{{
+				Name:  "platform",
+				Value: v1.ParamValue{Type: v1.ParamTypeString, StringVal: "I-do-not-exist and "},
+			}},
+			ServiceAccountName: "default",
+			TaskRef:            &v1.TaskRef{Name: "printer", Kind: v1.NamespacedTaskKind},
+		},
+		Status: v1.TaskRunStatus{
+			Status: duckv1.Status{
+				Conditions: duckv1.Conditions{{
+					Type:    apis.ConditionSucceeded,
+					Status:  corev1.ConditionTrue,
+					Reason:  "Succeeded",
+					Message: "All Steps have completed executing",
+				}},
+			},
 			TaskRunStatusFields: v1.TaskRunStatusFields{
 				Artifacts: &v1.Artifacts{},
 			},