diff --git a/runtime/interop/genesis.go b/runtime/interop/genesis.go
index 6b165c86f08..d9bfb167bac 100644
--- a/runtime/interop/genesis.go
+++ b/runtime/interop/genesis.go
@@ -126,11 +126,18 @@ func GethPragueTime(genesisTime uint64, cfg *clparams.BeaconChainConfig) *uint64
 // like in an e2e test. The parameters are minimal but the full value is returned unmarshaled so that it can be
 // customized as desired.
 func GethTestnetGenesis(genesisTime uint64, cfg *clparams.BeaconChainConfig) *core.Genesis {
-	//shanghaiTime := GethShanghaiTime(genesisTime, cfg)
-	// TODO: make these times dynamic...
+	shanghaiTime := GethShanghaiTime(genesisTime, cfg)
+	if cfg.CapellaForkEpoch == 0 {
+		shanghaiTime = &genesisTime
+	}
 	cancunTime := GethCancunTime(genesisTime, cfg)
-	shanghaiTime := genesisTime
+	if cfg.DenebForkEpoch == 0 {
+		cancunTime = &genesisTime
+	}
 	pragueTime := GethPragueTime(genesisTime, cfg)
+	if cfg.ElectraForkEpoch == 0 {
+		pragueTime = &genesisTime
+	}
 	cc := &params.ChainConfig{
 		ChainID:                       big.NewInt(defaultTestChainId),
 		HomesteadBlock:                bigz,
@@ -150,7 +157,7 @@ func GethTestnetGenesis(genesisTime uint64, cfg *clparams.BeaconChainConfig) *co
 		MergeNetsplitBlock:            bigz,
 		TerminalTotalDifficulty:       bigz,
 		TerminalTotalDifficultyPassed: true,
-		ShanghaiTime:                  &shanghaiTime,
+		ShanghaiTime:                  shanghaiTime,
 		CancunTime:                    cancunTime,
 		PragueTime:                    pragueTime,
 	}
diff --git a/testing/endtoend/endtoend_setup_test.go b/testing/endtoend/endtoend_setup_test.go
index 7cd3984b950..81ef7c300a8 100644
--- a/testing/endtoend/endtoend_setup_test.go
+++ b/testing/endtoend/endtoend_setup_test.go
@@ -53,16 +53,25 @@ func e2eMinimal(t *testing.T, cfg *params.BeaconChainConfig, cfgo ...types.E2ECo
 		ev.DepositedValidatorsAreActive,
 		ev.ValidatorsVoteWithTheMajority,
 		ev.ColdStateCheckpoint,
-		//ev.AltairForkTransition, TODO: Re-enable if able to start from older fork.
-		//ev.BellatrixForkTransition,
-		//ev.CapellaForkTransition,
-		ev.DenebForkTransition,
 		ev.FinishedSyncing,
 		ev.AllNodesHaveSameHead,
 		ev.ValidatorSyncParticipation,
 		ev.FeeRecipientIsPresent,
 		//ev.TransactionsPresent, TODO: Re-enable Transaction evaluator once it tx pool issues are fixed.
 	}
+	if cfg.AltairForkEpoch != 0 && cfg.AltairForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		evals = append(evals, ev.AltairForkTransition)
+	}
+	if cfg.BellatrixForkEpoch != 0 && cfg.BellatrixForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		evals = append(evals, ev.BellatrixForkTransition)
+	}
+	if cfg.CapellaForkEpoch != 0 && cfg.CapellaForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		evals = append(evals, ev.CapellaForkTransition)
+	}
+	if cfg.DenebForkEpoch != 0 && cfg.DenebForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		evals = append(evals, ev.DenebForkTransition)
+	}
+
 	testConfig := &types.E2EConfig{
 		BeaconFlags: []string{
 			fmt.Sprintf("--slots-per-archive-point=%d", params.BeaconConfig().SlotsPerEpoch*16),
@@ -128,15 +137,23 @@ func e2eMainnet(t *testing.T, usePrysmSh, useMultiClient bool, cfg *params.Beaco
 		ev.ValidatorsHaveWithdrawn,
 		ev.DepositedValidatorsAreActive,
 		ev.ColdStateCheckpoint,
-		//ev.AltairForkTransition, TODO: Re-enable if able to start from older fork.
-		//ev.BellatrixForkTransition,
-		//ev.CapellaForkTransition,
-		ev.DenebForkTransition,
 		ev.FinishedSyncing,
 		ev.AllNodesHaveSameHead,
 		ev.FeeRecipientIsPresent,
 		//ev.TransactionsPresent, TODO: Re-enable Transaction evaluator once it tx pool issues are fixed.
 	}
+	if cfg.AltairForkEpoch != 0 && cfg.AltairForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		evals = append(evals, ev.AltairForkTransition)
+	}
+	if cfg.BellatrixForkEpoch != 0 && cfg.BellatrixForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		evals = append(evals, ev.BellatrixForkTransition)
+	}
+	if cfg.CapellaForkEpoch != 0 && cfg.CapellaForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		evals = append(evals, ev.CapellaForkTransition)
+	}
+	if cfg.DenebForkEpoch != 0 && cfg.DenebForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		evals = append(evals, ev.DenebForkTransition)
+	}
 	testConfig := &types.E2EConfig{
 		BeaconFlags: []string{
 			fmt.Sprintf("--slots-per-archive-point=%d", params.BeaconConfig().SlotsPerEpoch*16),