diff --git a/pom.xml b/pom.xml
index 5e5f45d..cad1549 100644
--- a/pom.xml
+++ b/pom.xml
@@ -35,7 +35,7 @@ SOFTWARE.
   <packaging>jar</packaging>
   <name>eo-threads</name>
   <properties>
-    <eolang.version>0.30.0</eolang.version>
+    <eolang.version>0.32.0</eolang.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <stack-size>256M</stack-size>
diff --git a/src/test/eo/org/eolang/threads/mutex-test.eo b/src/test/eo/org/eolang/threads/mutex-test.eo
index aca7f32..5a512d8 100644
--- a/src/test/eo/org/eolang/threads/mutex-test.eo
+++ b/src/test/eo/org/eolang/threads/mutex-test.eo
@@ -71,13 +71,13 @@
     seq
       mut.acquire 1 > a
       mem.write
-        mem.times 2
+        mem.as-int.times 2
       a.release 1
   thread > t2
     seq
       mut.acquire 1 > b
       mem.write
-        mem.times 3
+        mem.as-int.times 3
       b.release 1
   assert-that > @
     seq
@@ -219,6 +219,7 @@
         finish.write
           call "gettimeofday"
         gt.
-          finish.minus start
+          finish.as-int.minus
+            start.as-int
           400000
       $.equal-to TRUE
diff --git a/src/test/eo/org/eolang/threads/thread-test.eo b/src/test/eo/org/eolang/threads/thread-test.eo
index 2158d72..73b4043 100644
--- a/src/test/eo/org/eolang/threads/thread-test.eo
+++ b/src/test/eo/org/eolang/threads/thread-test.eo
@@ -107,7 +107,8 @@
         sleep 200
         finish.write
           call "gettimeofday"
-        finish.minus start
+        finish.as-int.minus
+          start.as-int
       $.all-of
         $.less-than
           1000000
@@ -135,7 +136,8 @@
         finish.write
           call "gettimeofday"
         lt.
-          finish.minus start
+          finish.as-int.minus
+            start.as-int
           600000
       $.equal-to TRUE