diff --git a/.circleci/config.yml b/.circleci/config.yml
index d2a17637..c3d3cb25 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -16,6 +16,9 @@ executors:
   golang-latest:
     docker:
       - image: golang:1.19
+  golang-rc:
+    docker:
+      - image: golang:1.20-rc
 
 jobs:
   lint-markdown:
@@ -129,11 +132,11 @@ workflows:
       - build-source:
           matrix:
             parameters:
-              e: ["golang-previous", "golang-latest"]
+              e: ["golang-previous", "golang-latest", "golang-rc"]
       - unit-test:
           matrix:
             parameters:
-              e: ["golang-previous", "golang-latest"]
+              e: ["golang-previous", "golang-latest", "golang-rc"]
       - release-test
 
   tagged-release:
diff --git a/pkg/integrity/dsse_test.go b/pkg/integrity/dsse_test.go
index 36cb7532..6edb7835 100644
--- a/pkg/integrity/dsse_test.go
+++ b/pkg/integrity/dsse_test.go
@@ -22,12 +22,9 @@ import (
 )
 
 func Test_dsseEncoder_signMessage(t *testing.T) {
-	ecdsa := getTestSignerVerifier(t, "ecdsa.pem")
 	ed25519 := getTestSignerVerifier(t, "ed25519.pem")
 	rsa := getTestSignerVerifier(t, "rsa.pem")
 
-	fakeRand := make([]byte, 1024)
-
 	tests := []struct {
 		name     string
 		signers  []signature.Signer
@@ -36,19 +33,8 @@ func Test_dsseEncoder_signMessage(t *testing.T) {
 		wantHash crypto.Hash
 	}{
 		{
-			name:    "Multi",
-			signers: []signature.Signer{ecdsa, ed25519, rsa},
-			signOpts: []signature.SignOption{
-				options.WithRand(bytes.NewReader(fakeRand)), // For deterministic ECDSA signature.
-			},
-			wantHash: crypto.SHA256,
-		},
-		{
-			name:    "ECDSA",
-			signers: []signature.Signer{ecdsa},
-			signOpts: []signature.SignOption{
-				options.WithRand(bytes.NewReader(fakeRand)), // For deterministic ECDSA signature.
-			},
+			name:     "Multi",
+			signers:  []signature.Signer{ed25519, rsa},
 			wantHash: crypto.SHA256,
 		},
 		{
diff --git a/pkg/integrity/testdata/Test_dsseEncoder_signMessage/ECDSA.golden b/pkg/integrity/testdata/Test_dsseEncoder_signMessage/ECDSA.golden
deleted file mode 100644
index bb683961..00000000
--- a/pkg/integrity/testdata/Test_dsseEncoder_signMessage/ECDSA.golden
+++ /dev/null
@@ -1 +0,0 @@
-{"payloadType":"application/vnd.sylabs.sif-metadata+json","payload":"eyJPbmUiOjEsIlR3byI6Mn0K","signatures":[{"keyid":"SHA256:13cNV0A11AxgIQYCvlDmJlRi0CjRtjnYF47RzrMhlaU","sig":"MEQCIFo8YCnASBqoUCa0T2H2L/crRYxZ9vFkSpbplBYo4IR6AiAUNulVHknRpFlrRWayZLY6vG9WIW5mx/ywLyI90KchQA=="}]}
diff --git a/pkg/integrity/testdata/Test_dsseEncoder_signMessage/Multi.golden b/pkg/integrity/testdata/Test_dsseEncoder_signMessage/Multi.golden
index ead06c85..8854372d 100644
--- a/pkg/integrity/testdata/Test_dsseEncoder_signMessage/Multi.golden
+++ b/pkg/integrity/testdata/Test_dsseEncoder_signMessage/Multi.golden
@@ -1 +1 @@
-{"payloadType":"application/vnd.sylabs.sif-metadata+json","payload":"eyJPbmUiOjEsIlR3byI6Mn0K","signatures":[{"keyid":"SHA256:13cNV0A11AxgIQYCvlDmJlRi0CjRtjnYF47RzrMhlaU","sig":"MEQCIFo8YCnASBqoUCa0T2H2L/crRYxZ9vFkSpbplBYo4IR6AiAUNulVHknRpFlrRWayZLY6vG9WIW5mx/ywLyI90KchQA=="},{"keyid":"SHA256:x6l8ZblpSSXGaPMCzySedWg88BwIFcz8jlPb6el0mFs","sig":"SNnYRFIhDwWjk0pxoreaNiLea6L2WAFUm4boxnv7jiBNGmvMnbCxdsHYsTRBLXvMJHwEfKGvHFJmi9VvMe4JCQ=="},{"keyid":"SHA256:BhCwr7qZulYcOMSl2Jt2DuYHxHNnN6th4NdMqR/PGa4","sig":"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"}]}
+{"payloadType":"application/vnd.sylabs.sif-metadata+json","payload":"eyJPbmUiOjEsIlR3byI6Mn0K","signatures":[{"keyid":"SHA256:x6l8ZblpSSXGaPMCzySedWg88BwIFcz8jlPb6el0mFs","sig":"SNnYRFIhDwWjk0pxoreaNiLea6L2WAFUm4boxnv7jiBNGmvMnbCxdsHYsTRBLXvMJHwEfKGvHFJmi9VvMe4JCQ=="},{"keyid":"SHA256:BhCwr7qZulYcOMSl2Jt2DuYHxHNnN6th4NdMqR/PGa4","sig":"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"}]}
diff --git a/pkg/integrity/verify_test.go b/pkg/integrity/verify_test.go
index dc7a512a..8aa62ba6 100644
--- a/pkg/integrity/verify_test.go
+++ b/pkg/integrity/verify_test.go
@@ -982,8 +982,6 @@ func TestVerifier_Verify(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	ecdsa := getTestSignerVerifier(t, "ecdsa.pem")
-
 	ed25519 := getTestSignerVerifier(t, "ed25519.pem")
 	ed25519Pub, err := ed25519.PublicKey()
 	if err != nil {
@@ -1032,7 +1030,7 @@ func TestVerifier_Verify(t *testing.T) {
 			name: "SignatureNotValidErrorDSSE",
 			f:    oneGroupSignedDSSEImage,
 			opts: []VerifierOpt{
-				OptVerifyWithVerifier(ecdsa), // Not signed with EC.
+				OptVerifyWithVerifier(getTestSignerVerifier(t, "ecdsa.pem")), // Not signed with ECDSA.
 			},
 			wantErr: &SignatureNotValidError{ID: 3},
 		},