diff --git a/test/libyul/yulInterpreterTests/and_create.yul b/test/libyul/yulInterpreterTests/and_create.yul
index da962c3c0b04..5d8cd6cfde8d 100644
--- a/test/libyul/yulInterpreterTests/and_create.yul
+++ b/test/libyul/yulInterpreterTests/and_create.yul
@@ -4,6 +4,8 @@
     let b := and(u160max, create(0, u160max, 0))
     mstore(0, eq(a, b))
 }
+// ====
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   CREATE(0, 0, 0)
diff --git a/test/libyul/yulInterpreterTests/and_create2.yul b/test/libyul/yulInterpreterTests/and_create2.yul
index 0b83d818f087..c076c1203e11 100644
--- a/test/libyul/yulInterpreterTests/and_create2.yul
+++ b/test/libyul/yulInterpreterTests/and_create2.yul
@@ -6,6 +6,7 @@
 }
 // ====
 // EVMVersion: >=constantinople
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   CREATE2(0, 0, 0, 0)
diff --git a/test/libyul/yulInterpreterTests/create2.yul b/test/libyul/yulInterpreterTests/create2.yul
index b7484f5db8de..ad6eb5383796 100644
--- a/test/libyul/yulInterpreterTests/create2.yul
+++ b/test/libyul/yulInterpreterTests/create2.yul
@@ -5,6 +5,7 @@
 }
 // ====
 // EVMVersion: >=constantinople
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   CREATE2(0, 0, 32, 32)
diff --git a/test/libyul/yulInterpreterTests/datacopy.yul b/test/libyul/yulInterpreterTests/datacopy.yul
index ce5b6ce5c53a..61a3259a7c96 100644
--- a/test/libyul/yulInterpreterTests/datacopy.yul
+++ b/test/libyul/yulInterpreterTests/datacopy.yul
@@ -8,6 +8,8 @@ object "main"
     }
     object "sub" { code { sstore(0, 1) } }
 }
+// ====
+// bytecodeFormat: legacy
 // ----
 // Trace:
 // Memory dump:
diff --git a/test/libyul/yulInterpreterTests/dataoffset.yul b/test/libyul/yulInterpreterTests/dataoffset.yul
index f5a9aeb12f34..366ceb4bd273 100644
--- a/test/libyul/yulInterpreterTests/dataoffset.yul
+++ b/test/libyul/yulInterpreterTests/dataoffset.yul
@@ -6,6 +6,8 @@ object "main"
     }
     object "sub" { code { sstore(0, 1) } }
 }
+// ====
+// bytecodeFormat: legacy
 // ----
 // Trace:
 // Memory dump:
diff --git a/test/libyul/yulInterpreterTests/datasize.yul b/test/libyul/yulInterpreterTests/datasize.yul
index ff80edee7c94..f03d7083699f 100644
--- a/test/libyul/yulInterpreterTests/datasize.yul
+++ b/test/libyul/yulInterpreterTests/datasize.yul
@@ -6,6 +6,8 @@ object "main"
     }
     object "sub" { code { sstore(0, 1) } }
 }
+// ====
+// bytecodeFormat: legacy
 // ----
 // Trace:
 // Memory dump:
diff --git a/test/libyul/yulInterpreterTests/external_call_to_self.yul b/test/libyul/yulInterpreterTests/external_call_to_self.yul
index 3f5c887b4aeb..b2d69086a54f 100644
--- a/test/libyul/yulInterpreterTests/external_call_to_self.yul
+++ b/test/libyul/yulInterpreterTests/external_call_to_self.yul
@@ -11,6 +11,7 @@
 }
 // ====
 // simulateExternalCall: true
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   CALL(153, 0x11111111, 0, 64, 32, 256, 32)
diff --git a/test/libyul/yulInterpreterTests/external_call_unexecuted.yul b/test/libyul/yulInterpreterTests/external_call_unexecuted.yul
index 0a5458b47e2f..93bb9ec03d7b 100644
--- a/test/libyul/yulInterpreterTests/external_call_unexecuted.yul
+++ b/test/libyul/yulInterpreterTests/external_call_unexecuted.yul
@@ -2,6 +2,8 @@
 	let x := call(gas(), 0x45, 0x5, 0, 0x20, 0x30, 0x20)
 	sstore(0x64, x)
 }
+// ====
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   CALL(153, 69, 5, 0, 32, 48, 32)
diff --git a/test/libyul/yulInterpreterTests/external_callcode_unexecuted.yul b/test/libyul/yulInterpreterTests/external_callcode_unexecuted.yul
index 5245d7443a93..5d0da5c0633e 100644
--- a/test/libyul/yulInterpreterTests/external_callcode_unexecuted.yul
+++ b/test/libyul/yulInterpreterTests/external_callcode_unexecuted.yul
@@ -2,6 +2,8 @@
 	let x := callcode(gas(), 0x45, 0x5, 0, 0x20, 0x30, 0x20)
 	sstore(100, x)
 }
+// ====
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   CALLCODE(153, 69, 5, 0, 32, 48, 32)
diff --git a/test/libyul/yulInterpreterTests/external_delegatecall_unexecuted.yul b/test/libyul/yulInterpreterTests/external_delegatecall_unexecuted.yul
index a827181fca2c..3e84df570931 100644
--- a/test/libyul/yulInterpreterTests/external_delegatecall_unexecuted.yul
+++ b/test/libyul/yulInterpreterTests/external_delegatecall_unexecuted.yul
@@ -2,6 +2,8 @@
 	let x := delegatecall(gas(), 0x45, 0, 0x20, 0x30, 0x20)
 	sstore(100, x)
 }
+// ====
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   DELEGATECALL(153, 69, 0, 32, 48, 32)
diff --git a/test/libyul/yulInterpreterTests/external_staticcall_unexecuted.yul b/test/libyul/yulInterpreterTests/external_staticcall_unexecuted.yul
index 66ea146a06ab..664692bad565 100644
--- a/test/libyul/yulInterpreterTests/external_staticcall_unexecuted.yul
+++ b/test/libyul/yulInterpreterTests/external_staticcall_unexecuted.yul
@@ -4,6 +4,7 @@
 }
 // ====
 // EVMVersion: >=byzantium
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   STATICCALL(153, 69, 0, 32, 48, 32)
diff --git a/test/libyul/yulInterpreterTests/long_obect_name.yul b/test/libyul/yulInterpreterTests/long_obect_name.yul
index ede304029997..69b7acbb2bf9 100644
--- a/test/libyul/yulInterpreterTests/long_obect_name.yul
+++ b/test/libyul/yulInterpreterTests/long_obect_name.yul
@@ -13,6 +13,8 @@ object "t" {
 		}
 	}
 }
+// ====
+// bytecodeFormat: legacy
 // ----
 // Trace:
 // Memory dump:
diff --git a/test/libyul/yulInterpreterTests/pop_byte_shr_call.yul b/test/libyul/yulInterpreterTests/pop_byte_shr_call.yul
index ec9ca2fe6437..4386711a1c26 100644
--- a/test/libyul/yulInterpreterTests/pop_byte_shr_call.yul
+++ b/test/libyul/yulInterpreterTests/pop_byte_shr_call.yul
@@ -3,6 +3,7 @@
 }
 // ====
 // EVMVersion: >=constantinople
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   CALL(0, 0, 0, 0, 0, 0, 0)
diff --git a/test/libyul/yulInterpreterTests/side_effect_free.yul b/test/libyul/yulInterpreterTests/side_effect_free.yul
index adedd299f579..d68d57364b2b 100644
--- a/test/libyul/yulInterpreterTests/side_effect_free.yul
+++ b/test/libyul/yulInterpreterTests/side_effect_free.yul
@@ -14,6 +14,7 @@
 }
 // ====
 // EVMVersion: >=constantinople
+// bytecodeFormat: legacy
 // ----
 // Trace:
 // Memory dump:
diff --git a/test/libyul/yulInterpreterTests/zero_length_reads.yul b/test/libyul/yulInterpreterTests/zero_length_reads.yul
index 661db49ffbb6..68cae1b92129 100644
--- a/test/libyul/yulInterpreterTests/zero_length_reads.yul
+++ b/test/libyul/yulInterpreterTests/zero_length_reads.yul
@@ -18,6 +18,7 @@
 }
 // ====
 // EVMVersion: >=constantinople
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   RETURNDATACOPY(0, 1, 0)
diff --git a/test/libyul/yulInterpreterTests/zero_length_reads_and_revert.yul b/test/libyul/yulInterpreterTests/zero_length_reads_and_revert.yul
index 0d0f92420e30..c9143d7918f5 100644
--- a/test/libyul/yulInterpreterTests/zero_length_reads_and_revert.yul
+++ b/test/libyul/yulInterpreterTests/zero_length_reads_and_revert.yul
@@ -18,6 +18,7 @@
 }
 // ====
 // EVMVersion: >=constantinople
+// bytecodeFormat: legacy
 // ----
 // Trace:
 //   RETURNDATACOPY(0, 1, 0)