diff --git a/core-processor/src/configs.rs b/core-processor/src/configs.rs
index a829a7d7f9c..9964bef46f0 100644
--- a/core-processor/src/configs.rs
+++ b/core-processor/src/configs.rs
@@ -26,9 +26,6 @@ use gear_core::{
 
 pub use gear_wasm_instrument::syscalls::SyscallName;
 
-/// Number of max pages number to use it in tests.
-pub const TESTS_MAX_PAGES_NUMBER: u16 = 512;
-
 /// Contextual block information.
 #[derive(Clone, Copy, Debug, Default)]
 pub struct BlockInfo {
diff --git a/gtest/src/lib.rs b/gtest/src/lib.rs
index 46ebfaae02e..3743953fc96 100644
--- a/gtest/src/lib.rs
+++ b/gtest/src/lib.rs
@@ -531,10 +531,13 @@ pub mod constants {
 
     /// Gas allowance for executing user dispatch and set of generated
     /// by programs dispatches from execution of the user dispatch.
-    pub const GAS_ALLOWANCE: Gas = 750_000_000_000;
+    pub const GAS_ALLOWANCE: Gas = 1_000_000_000_000;
+
+    /// Max allowed user gas to apply for external message.
+    pub const MAX_USER_GAS_LIMIT: Gas = 750_000_000_000;
 
     /// Gas multiplier used to calculate equivalence of gas in token value.
-    pub const GAS_MULTIPLIER: GasMultiplier<Value, Gas> = GasMultiplier::ValuePerGas(6);
+    pub const GAS_MULTIPLIER: GasMultiplier<Value, Gas> = GasMultiplier::ValuePerGas(VALUE_PER_GAS);
 
     /* Currency-related constants */
 
@@ -583,5 +586,5 @@ pub mod constants {
     }
 
     /// Default initial balance for users.
-    pub const DEFAULT_USERS_INITIAL_BALANCE: Value = EXISTENTIAL_DEPOSIT * 100_000;
+    pub const DEFAULT_USERS_INITIAL_BALANCE: Value = 100_000 * UNITS;
 }
diff --git a/gtest/src/manager.rs b/gtest/src/manager.rs
index 04bd511ae53..e636df9af71 100644
--- a/gtest/src/manager.rs
+++ b/gtest/src/manager.rs
@@ -16,16 +16,6 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-mod block_exec;
-mod expend;
-mod hold_bound;
-mod journal;
-mod memory;
-mod reservations;
-mod send_dispatch;
-mod task;
-mod wait_wake;
-
 use crate::{
     constants::Value,
     error::usage_panic,
@@ -45,9 +35,8 @@ use crate::{
     GAS_MULTIPLIER, INITIAL_RANDOM_SEED, MAX_RESERVATIONS, RESERVE_FOR, VALUE_PER_GAS,
 };
 use core_processor::{
-    common::*,
-    configs::{BlockConfig, TESTS_MAX_PAGES_NUMBER},
-    ContextChargedForInstrumentation, ContextChargedForProgram, Ext,
+    common::*, configs::BlockConfig, ContextChargedForInstrumentation, ContextChargedForProgram,
+    Ext,
 };
 use gear_common::{
     auxiliary::{
@@ -81,6 +70,16 @@ use std::{
     mem,
 };
 
+mod block_exec;
+mod expend;
+mod hold_bound;
+mod journal;
+mod memory;
+mod reservations;
+mod send_dispatch;
+mod task;
+mod wait_wake;
+
 const OUTGOING_LIMIT: u32 = 1024;
 const OUTGOING_BYTES_LIMIT: u32 = 64 * 1024 * 1024;
 
diff --git a/gtest/src/manager/block_exec.rs b/gtest/src/manager/block_exec.rs
index 07361be7360..8f046dd3cfd 100644
--- a/gtest/src/manager/block_exec.rs
+++ b/gtest/src/manager/block_exec.rs
@@ -17,7 +17,7 @@
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
 use core_processor::SuccessfulDispatchResultKind;
-use gear_core::{gas::GasCounter, str::LimitedStr};
+use gear_core::{code::MAX_WASM_PAGES_AMOUNT, gas::GasCounter, str::LimitedStr};
 use task::get_maximum_task_gas;
 
 use super::*;
@@ -540,7 +540,7 @@ impl ExtManager {
             existential_deposit: EXISTENTIAL_DEPOSIT,
             mailbox_threshold: schedule.rent_weights.mailbox_threshold.ref_time,
             max_reservations: MAX_RESERVATIONS,
-            max_pages: TESTS_MAX_PAGES_NUMBER.into(),
+            max_pages: MAX_WASM_PAGES_AMOUNT.into(),
             outgoing_limit: OUTGOING_LIMIT,
             outgoing_bytes_limit: OUTGOING_BYTES_LIMIT,
         }
diff --git a/gtest/src/program.rs b/gtest/src/program.rs
index 4199da5d252..f9ea282fd41 100644
--- a/gtest/src/program.rs
+++ b/gtest/src/program.rs
@@ -22,7 +22,7 @@ use crate::{
     manager::ExtManager,
     state::actors::{Actors, GenuineProgram, Program as InnerProgram, TestActor},
     system::System,
-    Result, Value, GAS_ALLOWANCE,
+    Result, Value, MAX_USER_GAS_LIMIT,
 };
 use codec::{Codec, Decode, Encode};
 use gear_core::{
@@ -539,7 +539,7 @@ impl<'a> Program<'a> {
         ID: Into<ProgramIdWrapper>,
         T: Into<Vec<u8>>,
     {
-        self.send_bytes_with_gas_and_value(from, payload, GAS_ALLOWANCE, value)
+        self.send_bytes_with_gas_and_value(from, payload, MAX_USER_GAS_LIMIT, value)
     }
 
     /// Send the message to the program with bytes payload, gas limit and value.
diff --git a/gtest/src/state/mailbox/actor.rs b/gtest/src/state/mailbox/actor.rs
index 5e1f2d6632f..5744e096074 100644
--- a/gtest/src/state/mailbox/actor.rs
+++ b/gtest/src/state/mailbox/actor.rs
@@ -20,7 +20,7 @@ use crate::{
     error::usage_panic,
     manager::ExtManager,
     state::{accounts::Accounts, actors::Actors},
-    Log, Value, GAS_ALLOWANCE,
+    Log, Value, MAX_USER_GAS_LIMIT,
 };
 use codec::Encode;
 use gear_common::{
@@ -96,7 +96,7 @@ impl<'a> ActorMailbox<'a> {
         {
             0
         } else {
-            GAS_ALLOWANCE
+            MAX_USER_GAS_LIMIT
         };
 
         // Build a reply message