diff --git a/java/ql/integration-tests/kotlin/all-platforms/enhanced-nullability/test.py b/java/ql/integration-tests/kotlin/all-platforms/enhanced-nullability/test.py
index bec294a0623..ee985f6de57 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/enhanced-nullability/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/enhanced-nullability/test.py
@@ -1,13 +1,11 @@
 import pathlib
-import pytest
 
 
-@pytest.mark.kotlin1
-def test(codeql, java_full):
+def test(codeql, java_full, kotlinc_2_3_20):
     java_srcs = " ".join([str(s) for s in pathlib.Path().glob("*.java")])
     codeql.database.create(
         command=[
             f"javac {java_srcs} -d build",
-            "kotlinc -language-version 1.9 user.kt -cp build",
+            f"{kotlinc_2_3_20} -language-version 1.9 user.kt -cp build",
         ]
     )
diff --git a/java/ql/integration-tests/kotlin/all-platforms/external-property-overloads/test.py b/java/ql/integration-tests/kotlin/all-platforms/external-property-overloads/test.py
index 711066d9490..ca6aa65e8af 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/external-property-overloads/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/external-property-overloads/test.py
@@ -1,8 +1,6 @@
 import commands
-import pytest
 
 
-@pytest.mark.kotlin1
-def test(codeql, java_full):
-    commands.run("kotlinc -language-version 1.9 test.kt -d lib")
-    codeql.database.create(command="kotlinc -language-version 1.9 user.kt -cp lib")
+def test(codeql, java_full, kotlinc_2_3_20):
+    commands.run(f"{kotlinc_2_3_20} -language-version 1.9 test.kt -d lib")
+    codeql.database.create(command=f"{kotlinc_2_3_20} -language-version 1.9 user.kt -cp lib")
diff --git a/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/test.py b/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/test.py
index 6167bca8034..8da2eacc720 100755
--- a/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/test.py
@@ -1,6 +1,2 @@
-import pytest
-
-
-@pytest.mark.kotlin1
-def test(codeql, java_full):
-    codeql.database.create(command="kotlinc -J-Xmx2G -language-version 1.9 SomeClass.kt")
+def test(codeql, java_full, kotlinc_2_3_20):
+    codeql.database.create(command=f"{kotlinc_2_3_20} -J-Xmx2G -language-version 1.9 SomeClass.kt")
diff --git a/java/ql/integration-tests/kotlin/all-platforms/file_classes/test.py b/java/ql/integration-tests/kotlin/all-platforms/file_classes/test.py
index cdd8dee68ba..92689da3654 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/file_classes/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/file_classes/test.py
@@ -1,8 +1,6 @@
 import commands
-import pytest
 
 
-@pytest.mark.kotlin1
-def test(codeql, java_full):
-    commands.run("kotlinc -language-version 1.9 A.kt")
-    codeql.database.create(command="kotlinc -cp . -language-version 1.9 B.kt C.kt")
+def test(codeql, java_full, kotlinc_2_3_20):
+    commands.run(f"{kotlinc_2_3_20} -language-version 1.9 A.kt")
+    codeql.database.create(command=f"{kotlinc_2_3_20} -cp . -language-version 1.9 B.kt C.kt")
diff --git a/java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py b/java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py
index c0fc238c2a0..e559a8ef866 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py
@@ -2,7 +2,6 @@ import commands
 import pytest
 
 
-@pytest.mark.kotlin1
-def test(codeql, java_full):
+def test(codeql, java_full, kotlinc_2_3_20):
     commands.run(["javac", "Test.java", "-d", "bin"])
-    codeql.database.create(command="kotlinc -language-version 1.9 user.kt -cp bin")
+    codeql.database.create(command=f"{kotlinc_2_3_20} -language-version 1.9 user.kt -cp bin")
diff --git a/java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py b/java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py
index c44bc319a95..9238134e51a 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py
@@ -2,14 +2,13 @@ import commands
 import pytest
 
 
-@pytest.mark.kotlin1
-def test(codeql, java_full):
+def test(codeql, java_full, kotlinc_2_3_20):
     # Compile the JavaDefns2 copy outside tracing, to make sure the Kotlin view of it matches the Java view seen by the traced javac compilation of JavaDefns.java below.
     commands.run(["javac", "JavaDefns2.java"])
     codeql.database.create(
         command=[
-            "kotlinc kotlindefns.kt",
+            f"{kotlinc_2_3_20} kotlindefns.kt",
             "javac JavaUser.java JavaDefns.java -cp .",
-            "kotlinc -language-version 1.9 -cp . kotlinuser.kt",
+            f"{kotlinc_2_3_20} -language-version 1.9 -cp . kotlinuser.kt",
         ]
     )