diff --git a/eo-parser/src/main/java/org/eolang/parser/StrictXmir.java b/eo-parser/src/main/java/org/eolang/parser/StrictXmir.java
index 2061c82db8..b860cd4cd0 100644
--- a/eo-parser/src/main/java/org/eolang/parser/StrictXmir.java
+++ b/eo-parser/src/main/java/org/eolang/parser/StrictXmir.java
@@ -155,7 +155,7 @@ private static XML reset(final XML xml, final Path tmp) {
                         tmp.resolve(
                             uri.substring(uri.lastIndexOf('/') + 1)
                         )
-                    ).toString().replace("\\", "/")
+                    ).getAbsoluteFile().toString().replace("\\", "/")
                 );
             }
             new Xembler(
diff --git a/eo-parser/src/test/java/org/eolang/parser/StrictXmirTest.java b/eo-parser/src/test/java/org/eolang/parser/StrictXmirTest.java
index d893dcca79..d1535c73d2 100644
--- a/eo-parser/src/test/java/org/eolang/parser/StrictXmirTest.java
+++ b/eo-parser/src/test/java/org/eolang/parser/StrictXmirTest.java
@@ -30,6 +30,7 @@
 import com.yegor256.MktmpResolver;
 import com.yegor256.WeAreOnline;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
 import org.junit.jupiter.api.Assertions;
@@ -64,6 +65,22 @@ void validatesXmir(@Mktmp final Path tmp) {
         );
     }
 
+    @Test
+    @ExtendWith(MktmpResolver.class)
+    @ExtendWith(WeAreOnline.class)
+    void refersToAbsoluteFileName(@Mktmp final Path tmp) {
+        MatcherAssert.assertThat(
+            "XSD location must be absolute",
+            Paths.get(
+                new StrictXmir(StrictXmirTest.xmir("https://www.eolang.org/XMIR.xsd"), tmp)
+                    .xpath("/program/@xsi:noNamespaceSchemaLocation")
+                    .get(0)
+                    .substring("file:///".length())
+            ).isAbsolute(),
+            Matchers.is(true)
+        );
+    }
+
     @Test
     @ExtendWith(MktmpResolver.class)
     void validatesXmirWithLocalSchema(@Mktmp final Path tmp) {