Minnesota Drug Testing Laws for Employers

A Prohibition With Exceptions, Not a Set of Rules

The structural difference matters. Minn. Stat. 181.951, subd. 1(a) states that an employer may not request or require an employee or job applicant to undergo testing except as authorized in this section, and subd. 1(c) bars testing on an arbitrary and capricious basis. Most state statutes tell you how to test properly. Minnesota tells you that testing is off-limits unless you land inside a listed authorization.

It also applies to almost everyone. Minn. Stat. 181.950, subd. 7 defines employer as a person or entity located or doing business in Minnesota having one or more employees, and includes the state and its political subdivisions. There is no small-employer exemption.

The Policy Comes First, Literally

No policy, no testing. Minn. Stat. 181.952, subd. 1 sets the minimum contents: who is subject to testing; the circumstances under which drug, alcohol and cannabis testing may be requested or required; the right to refuse and the consequences of refusal; any adverse personnel action that may follow a confirmatory test; the right to explain a positive result and to request a confirmatory retest at the employee's expense; and any appeal procedures available.

Subd. 2 adds the notice architecture: written notice to all affected employees when the policy is adopted, to previously unaffected employees on transfer into an affected position, and to applicants before hire where the offer is contingent on passing a test, plus a conspicuously posted notice on the premises stating the policy exists and copies are available during business hours. On top of that, Minn. Stat. 181.953, subd. 6(a) requires the employer to give the person a form on which to acknowledge having seen the policy, before any test is requested.

One testing type carries its own clock: under 181.951, subd. 3, testing as part of a routine physical examination may be requested no more than once a year and only after at least two weeks' written notice that a test may be part of the physical.

Cannabis Is Not a Drug Here

That is not a figure of speech. Minn. Stat. 181.950, subd. 4 removes marijuana, tetrahydrocannabinols, cannabis flower, cannabis products, lower-potency hemp edibles and hemp-derived consumer products from the Act's definition of drug, and subd. 5a creates a separate cannabis testing category. Cannabis cannot simply ride along on a standard panel.

Three layers of protection sit on top of that:

• Applicants. Cannabis testing as a condition of employment is barred unless another law requires it, and refusal to hire solely because a test shows cannabis is barred, except for the positions listed in 181.951, subd. 9.
• Off-duty use. Minn. Stat. 181.938, subd. 2 makes cannabis products lawful consumable products, so an employer may not refuse to hire, discipline or discharge for off-premises use during nonworking hours. Discipline is preserved for use, possession, impairment, sale or transfer during working hours, on premises or while operating employer equipment, and where acting otherwise would violate law or cost a federal monetary or licensing benefit.
• Medical patients. Minn. Stat. 342.57, subd. 5(a) bars discrimination based on registry enrollment or on a positive test for cannabis components or metabolites, unless the patient used, possessed, sold, transported or was impaired on premises, during working hours or while operating employer equipment. Subd. 5a requires at least 14 days' written notice, citing the specific federal law and the specific federal benefit at risk, before taking an action that would otherwise be prohibited.

Due Process After the Sample

Minnesota builds in employee rights that most programs simply do not have:

1. Confirmatory testing on every sample that screened positive, by a NIDA-certified, CAP-accredited or New York-licensed laboratory, or through the compliant oral fluid process.
2. Written notice of results within three working days of the employer receiving the laboratory report.
3. A right to explain a positive result, with written notice of that right and three working days to submit information.
4. A self-funded retest of the original sample, requested within five working days; if it does not confirm, no adverse action may be taken.
5. No action on an unconfirmed screen, including withdrawal of a contingent job offer.
6. Counseling or rehabilitation before discharge on a first confirmed positive.

Each of those is a place a generic program fails quietly, and Minn. Stat. 181.956 turns the failure into a claim with attorney fees attached.

This Law Is Actively Moving

Minnesota's Act has been amended in consecutive sessions. The 2023 cannabis law rebuilt it around a separate cannabis testing category. The oral fluid testing provision at Minn. Stat. 181.953, subd. 5a was new in 2024 and amended again in 2025, and 181.951, subd. 8 was amended in 2024. If your Minnesota policy was drafted more than a session or two ago, the specific subdivisions it relies on may have changed text.

What To Do About It

Minnesota is usually the state that forces a multi-state employer to stop treating its program as one program. The workable pattern is a national baseline with a Minnesota annex: a compliant written policy and acknowledgment form, random testing narrowed to genuinely safety-sensitive roles, cannabis pulled from the applicant panel except for subd. 9 positions, and the notice-and-retest sequence built into the results workflow rather than handled case by case.

Minnesota's employment base runs through healthcare, medical device and precision manufacturing, retail and corporate headquarters, agriculture and food processing, finance and insurance, transportation and warehousing, construction, and iron ore mining and taconite processing. Mining, food processing and transportation carry real safety-sensitive populations, which is where the random authorization actually lives.