diff --git a/build/checksums.txt b/build/checksums.txt
index 454efa93c4..0d135b93e5 100644
--- a/build/checksums.txt
+++ b/build/checksums.txt
@@ -1,9 +1,9 @@
 # This file contains sha256 checksums of optional build dependencies.
 
-# version:spec-tests v5.1.0
-# https://github.com/ethereum/execution-spec-tests/releases
-# https://github.com/ethereum/execution-spec-tests/releases/download/v5.1.0
-a3192784375acec7eaec492799d5c5d0c47a2909a3cc40178898e4ecd20cc416  fixtures_develop.tar.gz
+# version:spec-tests tests@v20.0.0
+# https://github.com/ethereum/execution-specs/releases
+# https://github.com/ethereum/execution-specs/releases/download/tests%40v20.0.0
+b183702a5b447b465873865357ced9eb342315922e52e31b714e2de115dd0bb4  fixtures.tar.gz
 
 # version:golang 1.25.10
 # https://go.dev/dl/
diff --git a/build/ci.go b/build/ci.go
index 53ade2e1bf..320e858e82 100644
--- a/build/ci.go
+++ b/build/ci.go
@@ -452,7 +452,7 @@ func doTest(cmdline []string) {
 // downloadSpecTestFixtures downloads and extracts the execution-spec-tests fixtures.
 func downloadSpecTestFixtures(csdb *download.ChecksumDB, cachedir string) string {
 	ext := ".tar.gz"
-	base := "fixtures_develop"
+	base := "fixtures"
 	archivePath := filepath.Join(cachedir, base+ext)
 	if err := csdb.DownloadFileFromKnownURL(archivePath); err != nil {
 		log.Fatal(err)