diff --git a/params/chainparam.go b/params/chainparam.go
index b11390a7f4..c0b72c8df6 100644
--- a/params/chainparam.go
+++ b/params/chainparam.go
@@ -55,13 +55,16 @@ var BlobSchedule = Define(T[map[forks.Fork]BlobConfig]{
 // schedule configuration.
 func validateBlobSchedule(schedule map[forks.Fork]BlobConfig, cfg *Config2) error {
 	for f := range forks.All() {
-		if cfg.Scheduled(f) && f.Requires(forks.Cancun) {
+		if _, defined := schedule[f]; f.BlockBased() && defined {
+			return fmt.Errorf("contains fork %q with block-number based scheduling", f.ConfigName())
+		}
+		if cfg.Scheduled(f) && f.After(forks.Cancun) {
 			bcfg, defined := schedule[f]
 			if !defined {
-				return fmt.Errorf("invalid chain configuration: missing entry for fork %q in blobSchedule", f)
+				return fmt.Errorf("missing entry for fork %q", f.ConfigName())
 			} else {
 				if err := bcfg.validate(); err != nil {
-					return fmt.Errorf("invalid chain configuration in blobSchedule for fork %q: %v", f, err)
+					return fmt.Errorf("invalid blob config for fork %q: %v", f.ConfigName(), err)
 				}
 			}
 		}
diff --git a/params/testdata/invalid-blobschedule-blockbased.json b/params/testdata/invalid-blobschedule-blockbased.json
new file mode 100644
index 0000000000..72641f2d05
--- /dev/null
+++ b/params/testdata/invalid-blobschedule-blockbased.json
@@ -0,0 +1,24 @@
+{
+	"config": {
+		"homesteadBlock": 0,
+		"eip150Block": 0,
+		"eip155Block": 0,
+		"byzantiumBlock": 0,
+		"constantinopleBlock": 0,
+		"petersburgBlock": 0,
+		"istanbulBlock": 0,
+		"berlinBlock": 0,
+		"londonBlock": 0,
+		"mergeNetsplitBlock": 0,
+		"shanghaiTime": 900,
+		"chainId": 99,
+		"blobSchedule": {
+			"berlin": {
+				"target": 8,
+				"max": 5,
+				"baseFeeUpdateFraction": 3338477
+			}
+		}
+	},
+	"error": "invalid blobSchedule: contains fork \"berlin\" with block-number based scheduling"
+}
diff --git a/params/testdata/invalid-blobschedule-missing.json b/params/testdata/invalid-blobschedule-missing.json
new file mode 100644
index 0000000000..19d8bc1298
--- /dev/null
+++ b/params/testdata/invalid-blobschedule-missing.json
@@ -0,0 +1,26 @@
+{
+	"config": {
+		"homesteadBlock": 0,
+		"eip150Block": 0,
+		"eip155Block": 0,
+		"byzantiumBlock": 0,
+		"constantinopleBlock": 0,
+		"petersburgBlock": 0,
+		"istanbulBlock": 0,
+		"berlinBlock": 0,
+		"londonBlock": 0,
+		"mergeNetsplitBlock": 0,
+		"shanghaiTime": 900,
+		"cancunTime": 1000,
+		"pragueTime": 1100,		
+		"chainId": 99,
+		"blobSchedule": {
+			"cancun": {
+				"target": 8,
+				"max": 5,
+				"baseFeeUpdateFraction": 3338477
+			}
+		}
+	},
+	"error": "invalid blobSchedule: missing entry for fork \"prague\""
+}
diff --git a/params/testdata/invalid-blobschedule-validation.json b/params/testdata/invalid-blobschedule-validation.json
new file mode 100644
index 0000000000..8db36e56ba
--- /dev/null
+++ b/params/testdata/invalid-blobschedule-validation.json
@@ -0,0 +1,24 @@
+{
+	"config": {
+		"homesteadBlock": 0,
+		"eip150Block": 0,
+		"eip155Block": 0,
+		"byzantiumBlock": 0,
+		"constantinopleBlock": 0,
+		"petersburgBlock": 0,
+		"istanbulBlock": 0,
+		"berlinBlock": 0,
+		"londonBlock": 0,
+		"mergeNetsplitBlock": 0,
+		"shanghaiTime": 900,
+		"cancunTime": 1000,
+		"chainId": 99,
+		"blobSchedule": {
+			"cancun": {
+				"target": 8,
+				"max": 10
+			}
+		}
+	},
+	"error": "invalid blobSchedule: invalid blob config for fork \"cancun\": update fraction must be defined and non-zero"
+}