diff --git a/build-logic/src/main/kotlin/dfbuild.kotlinJvmCommon.gradle.kts b/build-logic/src/main/kotlin/dfbuild.kotlinJvmCommon.gradle.kts
index e670be80ec..0e0544bf69 100644
--- a/build-logic/src/main/kotlin/dfbuild.kotlinJvmCommon.gradle.kts
+++ b/build-logic/src/main/kotlin/dfbuild.kotlinJvmCommon.gradle.kts
@@ -23,3 +23,7 @@ artifacts {
         builtBy(tasks.jar)
     }
 }
+
+dependencies {
+    testImplementation(project(":common-test-utils"))
+}
diff --git a/common-test-utils/README.md b/common-test-utils/README.md
new file mode 100644
index 0000000000..6056bedf98
--- /dev/null
+++ b/common-test-utils/README.md
@@ -0,0 +1,3 @@
+## :common-test-utils
+
+This internal module contains shared test utilities.
diff --git a/common-test-utils/build.gradle.kts b/common-test-utils/build.gradle.kts
new file mode 100644
index 0000000000..659d97dbee
--- /dev/null
+++ b/common-test-utils/build.gradle.kts
@@ -0,0 +1,17 @@
+plugins {
+    with(conventions.plugins.dfbuild) {
+        alias(kotlinJvm11)
+    }
+}
+
+group = "org.jetbrains.kotlinx"
+
+dependencies {
+    api(projects.core)
+
+    api(libs.kotestAssertions) {
+        exclude("org.jetbrains.kotlin", "kotlin-stdlib-jdk8")
+    }
+    implementation(libs.kotlin.stdlib)
+    implementation(libs.kotlin.reflect)
+}
diff --git a/common-test-utils/src/main/kotlin/org/jetbrains/kotlinx/dataframe/DebugUtils.kt b/common-test-utils/src/main/kotlin/org/jetbrains/kotlinx/dataframe/DebugUtils.kt
new file mode 100644
index 0000000000..452a0d2d03
--- /dev/null
+++ b/common-test-utils/src/main/kotlin/org/jetbrains/kotlinx/dataframe/DebugUtils.kt
@@ -0,0 +1,45 @@
+package org.jetbrains.kotlinx.dataframe
+
+import io.kotest.matchers.shouldBe
+import io.kotest.matchers.types.shouldBeInstanceOf
+import org.jetbrains.kotlinx.dataframe.api.cast
+import org.jetbrains.kotlinx.dataframe.api.print
+import org.jetbrains.kotlinx.dataframe.api.schema
+import org.jetbrains.kotlinx.dataframe.columns.ColumnGroup
+import org.jetbrains.kotlinx.dataframe.columns.FrameColumn
+import org.jetbrains.kotlinx.dataframe.io.renderToString
+import kotlin.reflect.typeOf
+
+public fun <T : DataFrame<*>> T.toDebugString(rowsLimit: Int = 20): String =
+    """
+    ${renderToString(borders = true, title = true, columnTypes = true, valueLimit = -1, rowsLimit = rowsLimit)}
+
+    ${schema()}
+    """.trimIndent()
+
+/**
+ * Prints dataframe to console with borders, title, column types and schema
+ */
+public fun <T : DataFrame<*>> T.alsoDebug(println: String? = null, rowsLimit: Int = 20): T =
+    apply {
+        println?.let { println(it) }
+        print(borders = true, title = true, columnTypes = true, valueLimit = -1, rowsLimit = rowsLimit)
+        schema().print()
+    }
+
+public fun DataFrame<*>.shouldHaveColumnGroup(name: String, block: (ColumnGroup<*>) -> Unit = { }): ColumnGroup<*> =
+    getColumnOrNull(name).shouldBeInstanceOf<ColumnGroup<*>>(block)
+
+public fun DataFrame<*>.shouldHaveFrameColumn(name: String, block: (FrameColumn<*>) -> Unit = { }): FrameColumn<*> =
+    getColumnOrNull(name).shouldBeInstanceOf<FrameColumn<*>>(block)
+
+public inline fun <reified T> DataFrame<*>.shouldHaveColumn(
+    name: String,
+    block: (DataColumn<T>) -> Unit = { },
+): DataColumn<T> {
+    val shouldBeInstanceOf = getColumnOrNull(name).shouldBeInstanceOf<DataColumn<*>>()
+    shouldBeInstanceOf.type() shouldBe typeOf<T>()
+    val cast = shouldBeInstanceOf.cast<T>()
+    block(cast)
+    return cast
+}
diff --git a/core/build.gradle.kts b/core/build.gradle.kts
index 8c8d095df1..17e84351e5 100644
--- a/core/build.gradle.kts
+++ b/core/build.gradle.kts
@@ -69,6 +69,7 @@ dependencies {
     testImplementation(libs.kotestAssertions) {
         exclude("org.jetbrains.kotlin", "kotlin-stdlib-jdk8")
     }
+
     // kotest shouldBe forcefully escapes newlines when content is identical except additional newlines
     // which makes diff very hard to perceive. CodeGenerationTests.kt suffers from it a lot. using assertEquals there for working diff.
     testImplementation(kotlin("test"))
diff --git a/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/Utils.kt b/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/Utils.kt
index 0f884a042f..f5bdc4e1b8 100644
--- a/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/Utils.kt
+++ b/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/Utils.kt
@@ -1,53 +1,10 @@
 package org.jetbrains.kotlinx.dataframe
 
-import io.kotest.matchers.shouldBe
-import io.kotest.matchers.types.shouldBeInstanceOf
-import org.jetbrains.kotlinx.dataframe.api.cast
-import org.jetbrains.kotlinx.dataframe.api.print
-import org.jetbrains.kotlinx.dataframe.api.schema
-import org.jetbrains.kotlinx.dataframe.columns.ColumnGroup
-import org.jetbrains.kotlinx.dataframe.columns.FrameColumn
-import org.jetbrains.kotlinx.dataframe.io.renderToString
 import org.jetbrains.kotlinx.dataframe.types.UtilTests
 import java.net.URL
-import kotlin.reflect.typeOf
 
 fun testResource(resourcePath: String): URL = UtilTests::class.java.classLoader.getResource(resourcePath)!!
 
 fun testCsv(csvName: String) = testResource("$csvName.csv")
 
 fun testJson(jsonName: String) = testResource("$jsonName.json")
-
-fun <T : DataFrame<*>> T.toDebugString(rowsLimit: Int = 20) =
-    """
-    ${renderToString(borders = true, title = true, columnTypes = true, valueLimit = -1, rowsLimit = rowsLimit)}
-    
-    ${schema()}
-    """.trimIndent()
-
-/**
- * Prints dataframe to console with borders, title, column types and schema
- */
-fun <T : DataFrame<*>> T.alsoDebug(println: String? = null, rowsLimit: Int = 20): T =
-    apply {
-        println?.let { println(it) }
-        print(borders = true, title = true, columnTypes = true, valueLimit = -1, rowsLimit = rowsLimit)
-        schema().print()
-    }
-
-fun DataFrame<*>.shouldHaveColumnGroup(name: String, block: (ColumnGroup<*>) -> Unit = { }): ColumnGroup<*> =
-    getColumnOrNull(name).shouldBeInstanceOf<ColumnGroup<*>>(block)
-
-fun DataFrame<*>.shouldHaveFrameColumn(name: String, block: (FrameColumn<*>) -> Unit = { }): FrameColumn<*> =
-    getColumnOrNull(name).shouldBeInstanceOf<FrameColumn<*>>(block)
-
-inline fun <reified T> DataFrame<*>.shouldHaveColumn(
-    name: String,
-    block: (DataColumn<T>) -> Unit = { },
-): DataColumn<T> {
-    val shouldBeInstanceOf = getColumnOrNull(name).shouldBeInstanceOf<DataColumn<*>>()
-    shouldBeInstanceOf.type() shouldBe typeOf<T>()
-    val cast = shouldBeInstanceOf.cast<T>()
-    block(cast)
-    return cast
-}
diff --git a/dataframe-json/src/test/kotlin/org/jetbrains/kotlinx/dataframe/io/JsonTests.kt b/dataframe-json/src/test/kotlin/org/jetbrains/kotlinx/dataframe/io/JsonTests.kt
index 6716f0a7b8..073f77f529 100644
--- a/dataframe-json/src/test/kotlin/org/jetbrains/kotlinx/dataframe/io/JsonTests.kt
+++ b/dataframe-json/src/test/kotlin/org/jetbrains/kotlinx/dataframe/io/JsonTests.kt
@@ -21,6 +21,7 @@ import org.intellij.lang.annotations.Language
 import org.jetbrains.kotlinx.dataframe.AnyFrame
 import org.jetbrains.kotlinx.dataframe.DataFrame
 import org.jetbrains.kotlinx.dataframe.DataRow
+import org.jetbrains.kotlinx.dataframe.alsoDebug
 import org.jetbrains.kotlinx.dataframe.api.FormattedFrame
 import org.jetbrains.kotlinx.dataframe.api.JsonPath
 import org.jetbrains.kotlinx.dataframe.api.allNulls
@@ -34,7 +35,6 @@ import org.jetbrains.kotlinx.dataframe.api.format
 import org.jetbrains.kotlinx.dataframe.api.getColumnGroup
 import org.jetbrains.kotlinx.dataframe.api.getColumns
 import org.jetbrains.kotlinx.dataframe.api.getFrameColumn
-import org.jetbrains.kotlinx.dataframe.api.print
 import org.jetbrains.kotlinx.dataframe.api.schema
 import org.jetbrains.kotlinx.dataframe.api.toFloat
 import org.jetbrains.kotlinx.dataframe.api.toMap
@@ -1221,16 +1221,6 @@ fun parseJsonStr(jsonStr: String): JsonObject = Json.parseToJsonElement(jsonStr)
 
 fun testJson(jsonName: String) = testResource("$jsonName.json")
 
-/**
- * Prints dataframe to console with borders, title, column types and schema
- */
-fun <T : DataFrame<*>> T.alsoDebug(println: String? = null, rowsLimit: Int = 20): T =
-    apply {
-        println?.let { println(it) }
-        print(borders = true, title = true, columnTypes = true, valueLimit = -1, rowsLimit = rowsLimit)
-        schema().print()
-    }
-
 internal val nothingType: KType = typeOf<List<Nothing>>().arguments.first().type!!
 internal val nullableNothingType: KType = typeOf<List<Nothing?>>().arguments.first().type!!
 
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 1ac37404eb..b09b2ec6e5 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -28,3 +28,4 @@ include("dataframe-geo-jupyter")
 include("dataframe-openapi-generator")
 include("core")
 include("dataframe-compiler-plugin-core")
+include("common-test-utils")