diff --git a/src/JBMultiTerminal.sol b/src/JBMultiTerminal.sol
index bbc5d2b8..515f6a52 100644
--- a/src/JBMultiTerminal.sol
+++ b/src/JBMultiTerminal.sol
@@ -406,15 +406,15 @@ contract JBMultiTerminal is JBPermissioned, ERC2771Context, IJBMultiTerminal {
                 knownInvalidDecimals = true;
             } else if (accountingContext.token != JBConstants.NATIVE_TOKEN) {
                 // slither-disable-next-line calls-loop
-                try IERC165(accountingContext.token).supportsInterface(type(IERC20Metadata).interfaceId) returns (
-                    bool doesSupport
-                ) {
+                try IERC20Metadata(accountingContext.token).decimals() returns (uint8 decimals) {
                     // slither-disable-next-line calls-loop
-                    if (doesSupport && accountingContext.decimals != IERC20Metadata(accountingContext.token).decimals())
-                    {
+                    if (accountingContext.decimals != decimals) {
                         knownInvalidDecimals = true;
                     }
-                } catch {}
+                } catch {
+                    // The token didn't support `decimals`.
+                    knownInvalidDecimals = false;
+                }
             }
 
             // Make sure the decimals are correct.
diff --git a/test/units/static/JBMultiTerminal/TestAccountingContextsOf.sol b/test/units/static/JBMultiTerminal/TestAccountingContextsOf.sol
index c3a9af75..bb754b74 100644
--- a/test/units/static/JBMultiTerminal/TestAccountingContextsOf.sol
+++ b/test/units/static/JBMultiTerminal/TestAccountingContextsOf.sol
@@ -4,7 +4,7 @@ pragma solidity 0.8.23;
 import /* {*} from */ "../../../helpers/TestBaseWorkflow.sol";
 import {JBMultiTerminalSetup} from "./JBMultiTerminalSetup.sol";
 
-contract TestAccountingContextsFor_Local is JBMultiTerminalSetup {
+contract TestAccountingContextsOf_Local is JBMultiTerminalSetup {
     uint256 _projectId = 1;
     address _usdc = makeAddr("USDC");
     uint256 _usdcCurrency = uint32(uint160(_usdc));
@@ -29,8 +29,6 @@ contract TestAccountingContextsFor_Local is JBMultiTerminalSetup {
         // mock call to tokens decimals()
         mockExpect(_usdc, abi.encodeCall(IERC20Metadata.decimals, ()), abi.encode(6));
 
-        // mock call to rulesets currentOf returning 0 to bypass ruleset checking
-
         // setup: return data
         JBRuleset memory ruleset = JBRuleset({
             cycleNumber: 1,
@@ -44,13 +42,9 @@ contract TestAccountingContextsFor_Local is JBMultiTerminalSetup {
             metadata: 0
         });
 
+        // mock call to rulesets currentOf returning 0 to bypass ruleset checking
         mockExpect(address(rulesets), abi.encodeCall(IJBRulesets.currentOf, (_projectId)), abi.encode(ruleset));
 
-        // mock supports interface call
-        mockExpect(
-            _usdc, abi.encodeCall(IERC165.supportsInterface, (type(IERC20Metadata).interfaceId)), abi.encode(true)
-        );
-
         // call params
         JBAccountingContext[] memory _tokens = new JBAccountingContext[](1);
         _tokens[0] = JBAccountingContext({token: _usdc, decimals: 6, currency: uint32(uint160(_usdc))});
diff --git a/test/units/static/JBMultiTerminal/TestAddAccountingContextsFor.sol b/test/units/static/JBMultiTerminal/TestAddAccountingContextsFor.sol
index 9cf0a908..da960c7c 100644
--- a/test/units/static/JBMultiTerminal/TestAddAccountingContextsFor.sol
+++ b/test/units/static/JBMultiTerminal/TestAddAccountingContextsFor.sol
@@ -79,8 +79,6 @@ contract TestAddAccountingContextsFor_Local is JBMultiTerminalSetup {
         // mock call to tokens decimals()
         mockExpect(_usdc, abi.encodeCall(IERC20Metadata.decimals, ()), abi.encode(6));
 
-        // mock call to rulesets currentOf returning 0 to bypass ruleset checking
-
         // setup: return data
         JBRuleset memory ruleset = JBRuleset({
             cycleNumber: 1,
@@ -94,13 +92,9 @@ contract TestAddAccountingContextsFor_Local is JBMultiTerminalSetup {
             metadata: 0
         });
 
+        // mock call to rulesets currentOf returning 0 to bypass ruleset checking
         mockExpect(address(rulesets), abi.encodeCall(IJBRulesets.currentOf, (_projectId)), abi.encode(ruleset));
 
-        // mock supports interface call
-        mockExpect(
-            _usdc, abi.encodeCall(IERC165.supportsInterface, (type(IERC20Metadata).interfaceId)), abi.encode(true)
-        );
-
         // call params
         JBAccountingContext[] memory _tokens = new JBAccountingContext[](1);
         _tokens[0] = JBAccountingContext({token: _usdc, decimals: 6, currency: uint32(uint160(_usdc))});
@@ -284,13 +278,6 @@ contract TestAddAccountingContextsFor_Local is JBMultiTerminalSetup {
         // mock rulesets call
         mockExpect(address(rulesets), abi.encodeCall(IJBRulesets.currentOf, (_projectId)), abi.encode(ruleset));
 
-        // mock token interface support call
-        mockExpect(
-            address(someToken),
-            abi.encodeCall(IERC165.supportsInterface, (type(IERC20Metadata).interfaceId)),
-            abi.encode(true)
-        );
-
         // mock token call
         mockExpect(address(someToken), abi.encodeCall(IERC20Metadata.decimals, ()), abi.encode(18));
 
@@ -323,13 +310,6 @@ contract TestAddAccountingContextsFor_Local is JBMultiTerminalSetup {
         // mock rulesets call
         mockExpect(address(rulesets), abi.encodeCall(IJBRulesets.currentOf, (_projectId)), abi.encode(ruleset));
 
-        // mock token interface support call
-        mockExpect(
-            address(someToken),
-            abi.encodeCall(IERC165.supportsInterface, (type(IERC20Metadata).interfaceId)),
-            abi.encode(true)
-        );
-
         // mock token call
         mockExpect(address(someToken), abi.encodeCall(IERC20Metadata.decimals, ()), abi.encode(18));
 
diff --git a/test/units/static/JBMultiTerminal/TestPay.sol b/test/units/static/JBMultiTerminal/TestPay.sol
index aaaa1a78..77c246c1 100644
--- a/test/units/static/JBMultiTerminal/TestPay.sol
+++ b/test/units/static/JBMultiTerminal/TestPay.sol
@@ -72,13 +72,6 @@ contract TestPay_Local is JBMultiTerminalSetup {
             address(directory), abi.encodeCall(IJBDirectory.controllerOf, (_projectId)), abi.encode(address(this))
         );
 
-        // mock supports interface call
-        mockExpect(
-            address(_mockToken),
-            abi.encodeCall(IERC165.supportsInterface, (type(IERC20Metadata).interfaceId)),
-            abi.encode(true)
-        );
-
         // mock call to token decimals
         mockExpect(address(_mockToken), abi.encodeCall(IERC20Metadata.decimals, ()), abi.encode(6));